Hi everyone, thanks for watching! I saw a lot of misconceptions about gravity in the comments so I thought I would clear some things up. Gravity does not slow the pendulum down, in fact, gravity is the reason it keeps moving. With no gravity, a pendulum would not swing at all. Gravity is always pulling on the ball causing it to move and change potential energy to kinetic energy in a repeating cycle. And since I can't help myself...gravity is everywhere, even in space. You just usually see things in space as weightless because they are usually orbiting the earth which means they are in free fall around the earth making them weightless. You are never free from gravity even in deep space. As proof of this, remember our sun (and you) is falling around (orbiting) the super massive black hole at the center of the milky way 500,000,000,000,000,000 kilometers away due to its gravity. The only way you "feel" gravity or weight is when there is something stopping you from falling.
So, forgeting about energy conversion and the fact it's not perfect vacuum, gravity's constant pull makes the ball swing at constant cycles, but it slows down because the string don't let it "orbit". So, slowly but surely, it aligns with gravity's normal Did I get it right?
Most of your resistance here is coming from the inefficient pivot point. You're losing too much energy there in friction and vibration. You can't just tie a string to a random point and call it a pendulum. With a decent pendulum, your ball should be swinging for days in a vacuum.
The air would attempt to escape due to a lack of air pressure surrounding the object, but I doubt the pressure inside the coconut would be great enough to break it.
That doesn`t even make any sense. If you`re trying to be funny, someone else won the award. People with autism are still humans. Emphasize "people". Like I said before, it doesn`t even make any sense. -Gaming
Wow, all these vacuum chamber videos are great! They really help me appreciate the work that space and rocket engineers/scientists have done in the past. Like figuring out how explosive materials such as gasoline behaves in outer spaces. Or how rubber and metal contracts or softens in space. Even how radio frequencies travel through a vacuum. All these things are incredible feats of human knowledge and collaboration :) I dont understand any of it, but these videos kinda make me curious, and theyre pretty legit!
the width of the swing as viewed from one side isn't a very good measure since your pendulum doesn't always swing parallel to the side you're measuring from.
+Daniel Chavez true, by the time I measured it it had very little lateral movement when I viewed it from the side. Initially you can see it does swing all directions but eventually it is almost entirely in the viewing direction.
Hydraulic Press Action I HAVE A QUESTION! also, you should try it. ok, so what do you think would happen if you took all of the air out of the vacuum chamber, then submerged it in water, would it sink or float...?
Daniel Chavez agree, if the massurement could have been taken from an up side view it could have been slightly more accurate by meassuring the diameter of the ball's movement instead of the aparent 'paralle'l swing.
Great stuff. "IF" you do this one again in the future, might I recommend suspending your weight from 2 strings much like a Newton's Cradle (one from each bolt at the top) as the camera is not 100% able to pick up if the ball is swinging partially to and from the camera, thereby altering the left/right linear measurement. YES you can trace the arch, but most wont. GREAT STUFF!!!
Its is an extremely small scale. The difference is enormous by proportion. A large generator built on an axis would have more measurable differences. This would have a profound effect on the output of a custom generator
Hi, I know we’re a little late but, storing the energy in more mass ( heavier ball) would help over come any losses due to pivotal string resistance. Would last for days.
tries he did in this is video = 4 tries, trice, ice, ice cube ice cube has 8 vortex hence 8 - 4 = 4 the amount of metal ball = 1 4 - 1 = 3 triangle has 3 points illoominot-e confirmed
The bigest power that is on the pendulum with air or not is the gravity thats why the ball stops and there isnt much difrens between the two swings! Now if u will do the same expiriment with the second swing from higher place than the fist the u will get a significant difrence beetween the swings , and it will be intresting to! ( difrence from the sea lvl the first swing took place ex 1st from your house if you dont live on a mountain : ) and the 2nd from a mountain then we will have some significant difrence and it vill be fan to watch !) keep the good job and sory for my grammar but im from greece sooo .... its like an exqiuse :D be healthy live strong greetings from greece
Should attach the string to a spherical magnet at the top with another magnet outside the chamber and see if that difference in friction makes a difference in swing time.
This gives me hope for my scaled down Foucault Pendulum. You should try a longer thread (as long as fits) and use a controlled release (say an electric magnet) and see if you can measure the rotation of the earth. Your top attachment needs a bit of work though. It mustn't induce elliptical motion. That happens naturally anyway.
I subbed in Dr. Vantassell's physics AP calculus class this week, and in our lab we all did an experiment demonstrating the general form of simple harmonic motion using a vertical spring and weight, estimating the time of each cycle or rotation, by measuring the time and distance of each cycle using a differential equation. Quote: "time is just an estimate"
+Drop Kingdom well gravity doesn't slow it down, gravity is what is making it keep moving. Gravity is just pulling it down, not slowing it down. In fact if you removed gravity and gave it an initial push, it wouldn't give the back and forth motion it would just try to swing in a circle around the attached point.
Somebody may have made these comments already, but gravity pulls the pendulum straight down (stopping/slowing oscillation) more so than the friction of the string regardless of air resistance. If you were to graph the data from start to dead still, the delta would be much more visible. Suspending the bearing from a pair of strings, like that desktop toy with multiple balls, would contain the swing to one axis too. This would help gather data even more with the styrofoam demo.
Enjoyable video, however, I would suggest using an electromagnet in the future because it may not make a huge difference but when your pulling the magnet away it still has an effect on the ball, while an electro magnet would not once the circuit is not functional
A minor observation on your procedure: in the Styrofoam test the foam hit the sides on the first swing (and second in vacuum) thus dissipating some of the energy. Having the foam test done with a spacer holding the pendulum up that would fall free would likely provide more reliable results. Also as +Daniel Chavez and +Ahsan Ejaz observed the motion was not unidirectional. there may be, depending on how it was fastened, more friction in one direction than another. Don't expect any drastic changes in outcome, but there are unaccounted for variables.
it would be cool to see a flame be put out in a vacume, what type of fire would not go out in a vacume? are fire and vacume chambers a bad combination?
You need an "oxidizer" to maintain combustion. Oxygen is not the only such chemical. Potassium nitrate releases oxygen when heated, making it a plausible candidate for a self-sustaining vacuum fire, depending on how quickly the oxygen diffuses away from the fuel. From what I know of chlorine trifluoride, I wouldn't be surprised if it lit the vacuum chamber itself on fire.
Cool video. I wonder if your experiment might be better using a heavier (larger) steel ball and the longest pendulum that can fit in your chamber. Also you might be able to reduce the friction lost in the string by replacing it with a stiff rod that pivots on a knife edge (razor blade) resting on two flat steel plates, one on either side of the pendulum. Also I've wanted to make a newtons cradle in a vacuum for years but never had the time to try it.
what about friction on connections with ball and the top of the box? If ıt is reduced to zero friction, would pendulum goes forever in the vacoomed space?
Nice video and very interesting. I would love to see you putting an electronic device such as an iPhone inside your vacuum chanber and see what happens to it after it gets put under vacuum. Will the screen crack??? Or will it survive?
I think you should call string damping isnt it? And I guess not only the string but also where it is tied up too... I couldn't get why you called it friction.... And what would happen in lower and higher temperatures ???
i think the energy lost is within the change in velocity causing friction within the rope. Definitely so as the rope causes a slight spring and twist to the pendulum's arc which causes an imbalanced change in momentum. i wonder if a different rope would have a different effect. And also im curious how the earth's rotation could influence a pendulum's arc
It was so cool to see it rotate under a vacuum. In air it basically maintained its linear path probably due to the air being forced around it, like a pingpong in a jetstream.. But in a vacuum it was free to rotate as the earth spins??
For the ball on it's own, due to the aero dynamic nature of the ball, Its not the rope its not friction, its not air resistance, its the downward force of gravity in both vacuum and air. With styrofoam. Its gravity and air resitance that slows it down in the air... it's gravity that slows it down in the vacuum
first of all, gravity, secondly, the vacuum pendulum started switching the directions it was swinging in, wasting a TON of energy because of the restrictive movement
Plz do an experiment to see if all the objects fall with the same speed in vacuum. For example will a feather and an iron ball fall equally fast when those are dropped inside vacuum, thanks!
I think the issue with the test was that it actually hit the acrylic, losing a lot of potential and kinetic energy. To best test this, I think you would need at least a 2x2x4 chamber, hang the ball on a 1.8-1.9 foot string so it won't make contact with the walls, and start it about an inch from the lid/top. I think only then could we say the deciding factor here is friction.
I can't see how your rope is attached, so I don't know if it is a simple loop that is causing drag on a rod or it is just a fixed tied rope, but it seems odd to me that your pendulum would stop swinging in a good vacuum so quickly. I think you've shown pretty well that air resistance (or lack thereof) isn't the major factor in causing your pendulum to lose energy. It seems odd to me that a fixed-tied rope would generate heat due to tension to cause your pendulum to slow so quickly in a vacuum. If you have a loop of string that is dragging on a rod with each swing, I'd be interested to see you use a magnetic bearing to determine how much longer the sphere would swing in such a condition. I'd also be curious to see if most of the energy is lost in the beginning rather than at the end of the swing time. It seems to be a nonlinear loss of energy in your system. Can you measure the swing distance at 30 second intervals to see if the energy loss is greater at different times?
Unfortunately measuring the width wont give you accurate data since the pendulum doesn't just swing from left to right but also against you and away from you. The pendulum isn't restricted to a certain bath and you're measuring the width from the same angle. Try for instance to measure the width at 2:24 and 2:27, even though you know these measurements should be fairly identical, they wont be. You should have used two lines attached to the ball, like the balls in newtons cradle.
How about doing some electrical experiments in a vacuum chamber. You could start with just seeing how far the spark gap could be with no air resistance. It would be fun to explore the dynamics of vacuum tube technology.
Please answer this question. Is there friction even if there are no particles ( Not even a single air particle) around? I hope not because the most recent definition of friction defines friction as a effect of electro-magnetic fore between two surfaces and if there is no surrounding particle then there should not have been frictional fore. But if this is the case then, why does google say there is friction in space?
Looks like most of the friction slowing the bare ball in the vacuum is the bolt holding the string. The string is rubbing against the nut and eating up the momentum.
What about a subwoofer (or woofer... something that fit the vacuum chamber). To get the same displacement for a low frequency of 20 Hz, the power required should be quite different. Keep in mind that the coil may overheat quickly in vacuum, si the woofer may change motion as a warm coil increase resistance or it may generate smoke.
I think the 'problem' (or "drawback") in his experiment - which is what means the pendulum doesn't swing 'perpetually' - is that it is, after all, only a 'miniature-scale model' and, therefore, due to its small size, the pendulum, in swinging downwards, does not have the same degree or measure of opportunity it would otherwise have if it were a gigantic pendulum attached to a 'towering' structure (like the Eiffel Tower!) to accelerate in a downward direction and, thereby, gather a lot of speed (having, also, been 'swung' from a 'high', horizontal 'starting position') before, finally, starting to swing back upwards again towards the top of the high-built, tall (as opposed to short, low-built and small-scale, relatively "non-accelerational" [in terms of total, 'penultimate' acceleration achieved]) pendulum-suspending tower! I.e. (for the sake of 'analogy'), if you wanted to fire a 'pendulum-shaped' bullet upwards into the air which would travel out of a gun and into the air quickly (eg, at approximately "supersonic" speed!) you would have to, first, put a sufficient quantity of gunpowder behind the bullet inside the gun's chamber to make this degree of 'penultimate acceleration' of the bullet possible; then, the 'pendulum-shaped' bullet might reach into the air up to the height you wanted it to (eg, to "hit a target") before then re-descending or "falling back down again" (due to its gradual deceleration by gravity as it travelled upwards through the total distance of its upward motion)! Could this, combined with elimination or reduction of 'resistance' to the motion of a pendulum (by, for example, putting a swinging pendulum in a vacuum to eliminate 'drag'), be the 'secret' or 'key' to the construction of a "perpetually swinging pendulum", 'free-energy' generating machine!? NOTE: These 'comments', however, are "wishful thinking" (and "wrong"), are they not!?
I didn't understand the part in 3:09, we all taught that a pendulum never stops swinging in a vacuum. You said something about the friction of the swinging robe producing resistance? But the robe is in a vacuum right?
Be interesting to see how much longer a golf ball would swing compared to a steel bearing since golf balls have the aerodynamic dimples. make them both the same weight so you don't have that deviation. Doubt it'd be different in the vacuum so do it in air.
I remember doing this in my school... we just do it in a little bit different way,,, and yes just like any other school you put formula to compute it,,, And yeah air resistance is too little too mind when it's just a small but heavy sphere...
Hello! My theory is that if you put a gyroscope working with magnetic levitation in complete vacuum, it will last forever, because no friction is being developed! It is an experiment I always wanted to make, it would be awesome if you could give it a try!!
I am pretty sure the gravity also acts as a damper. When the ball is moving away ftom its mean position the gravity is resisting it so i think gravity is the main reason for it to stop.
No, full vaccum is virtually impossible to do, but it actually gets close to it. I think it lowers the pressure to about 30 mmHg which is about 25 times less pressure than normal (760mmHg)
Please consider my ideas and like when you have read :D Have some things to put in a vacuum chamber: lightbulb putty\slime also *rotten* eggs(they have air in it) balls like basketball, football, tennis ball etc. coconut uninflated and tied baloon a perfume bottle for a better smell after the rotten egg aero bars a vacuum chamber
a better way to have done this was attach the pendulum at 2 points making a V with the string, it would stop it from going in circles and thus give you more accurate results
well doh it will stop, gravity will stop it and also the friction with the connection point, the friction with air is a factor of course but that doesnt mean without air there are no other forces to slow the thing down
Cool, but predictable. No surprise ending. The do- over. Take a pendulum more like a clock's pendulum. A broad flat disc and hinged so it can't turn sideways. In air, do it twice with the disc oriented parallel to swing and broadside to swing. Something like a silver dollar hung from 2 wires. Then in vacuum, but only once with it broadside to swing. And use a longer radius. Instead of 5 minutes or something, show time until very small swings. The styrofoam was to bulky, it hit the far side of the tank. Even a small post-it note would've worked better.
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Hi everyone, thanks for watching! I saw a lot of misconceptions about gravity in the comments so I thought I would clear some things up. Gravity does not slow the pendulum down, in fact, gravity is the reason it keeps moving. With no gravity, a pendulum would not swing at all. Gravity is always pulling on the ball causing it to move and change potential energy to kinetic energy in a repeating cycle.
And since I can't help myself...gravity is everywhere, even in space. You just usually see things in space as weightless because they are usually orbiting the earth which means they are in free fall around the earth making them weightless. You are never free from gravity even in deep space. As proof of this, remember our sun (and you) is falling around (orbiting) the super massive black hole at the center of the milky way 500,000,000,000,000,000 kilometers away due to its gravity. The only way you "feel" gravity or weight is when there is something stopping you from falling.
Hydraulic Press Action Damn u so smart
Yes there is always gravity. But there is difference in gravitational pull.
Hydraulic Press Action thanks for this explannation
please try to put newtons cradle in there!
So, forgeting about energy conversion and the fact it's not perfect vacuum, gravity's constant pull makes the ball swing at constant cycles, but it slows down because the string don't let it "orbit". So, slowly but surely, it aligns with gravity's normal
Did I get it right?
Your duct tape job pissed me off
Conner Langford lol
Conner Langford ya that bothered me more than it should have lol
exactly what i thought lol
First world problems where the biggest thing that pisses you off is some duct tape.
+Adrian Mack Can't blame us.
Most of your resistance here is coming from the inefficient pivot point. You're losing too much energy there in friction and vibration. You can't just tie a string to a random point and call it a pendulum. With a decent pendulum, your ball should be swinging for days in a vacuum.
It helps with longer string too
He has mentioned that in the video, that the system is losing energy to friction... i know there's no point of replying 4 years later lmao
@@ted467 why does longer string help?
@@thecomplexity "i know there's no point of replying 4 years later lmao"
I did read it.
@@jerryzheng5464 it increases the time period as t=2(pi)(L/g)^1/2 where L is length of string
You should have taped a picture of Glenn Miller to the back of the box.
He swings no matter where he is.
i don't need to know him, but its a good joke :D
In the mood is one of my favorite jazz pieces ever, Glenn Miller is a legend
am i the only one who is bugged out by how the timer wasn't stuck to the glass properly with the full sticky side of the tape?
can you put a coconut in the vacuum chamber thanks David
David Yaakovi It would have to have a puncture in it for air to escape but besides that it would be very interesting
....no it wouldn't....
The air would attempt to escape due to a lack of air pressure surrounding the object, but I doubt the pressure inside the coconut would be great enough to break it.
thats the reason it should be tested... because science :D
@@Noodler i think it will be
starts at 2:07
For autists: 0:00
For humans: 2:07
lol i have autism and for me the video already ended o.o :D
That doesn`t even make any sense. If you`re trying to be funny, someone else won the award. People with autism are still humans. Emphasize "people". Like I said before, it doesn`t even make any sense.
-Gaming
Wow, all these vacuum chamber videos are great! They really help me appreciate the work that space and rocket engineers/scientists have done in the past. Like figuring out how explosive materials such as gasoline behaves in outer spaces. Or how rubber and metal contracts or softens in space. Even how radio frequencies travel through a vacuum. All these things are incredible feats of human knowledge and collaboration :)
I dont understand any of it, but these videos kinda make me curious, and theyre pretty legit!
the width of the swing as viewed from one side isn't a very good measure since your pendulum doesn't always swing parallel to the side you're measuring from.
+Daniel Chavez true, by the time I measured it it had very little lateral movement when I viewed it from the side. Initially you can see it does swing all directions but eventually it is almost entirely in the viewing direction.
Hydraulic Press Action I HAVE A QUESTION! also, you should try it. ok, so what do you think would happen if you took all of the air out of the vacuum chamber, then submerged it in water, would it sink or float...?
Golden Touch It would weigh less than the volume of water it would displace if forceibly submerged, so, on its own, it would float in water.
Daniel Chavez agree, if the massurement could have been taken from an up side view it could have been slightly more accurate by meassuring the diameter of the ball's movement instead of the aparent 'paralle'l swing.
Put memory foam in your vacuum
As a high school Physics teacher I love this video. Thank you.
nice test, seeing your next experiment
Do a Steel ball and a feather falling in a vacuum chamber!
Great stuff. "IF" you do this one again in the future, might I recommend suspending your weight from 2 strings much like a Newton's Cradle (one from each bolt at the top) as the camera is not 100% able to pick up if the ball is swinging partially to and from the camera, thereby altering the left/right linear measurement. YES you can trace the arch, but most wont. GREAT STUFF!!!
Its is an extremely small scale. The difference is enormous by proportion. A large generator built on an axis would have more measurable differences. This would have a profound effect on the output of a custom generator
The difference is less because there is still gravity .
Hi, I know we’re a little late but, storing the energy in more mass ( heavier ball) would help over come any losses due to pivotal string resistance. Would last for days.
Bruh
Like foucault pendulum ?
tries he did in this is video = 4
tries, trice, ice, ice cube
ice cube has 8 vortex hence 8 - 4 = 4
the amount of metal ball = 1
4 - 1 = 3
triangle has 3 points
illoominot-e confirmed
Adi Wasturaka but 3+1=4
3+1
3-1
Warriors blew a 3-1 Lead
Adi Wasturaka cringiest joke I've read this year
Thank you for taking my suggestion
The bigest power that is on the pendulum with air or not is the gravity thats why the ball stops and there isnt much difrens between the two swings! Now if u will do the same expiriment with the second swing from higher place than the fist the u will get a significant difrence beetween the swings , and it will be intresting to! ( difrence from the sea lvl the first swing took place ex 1st from your house if you dont live on a mountain : ) and the 2nd from a mountain then we will have some significant difrence and it vill be fan to watch !) keep the good job and sory for my grammar but im from greece sooo .... its like an exqiuse :D be healthy live strong greetings from greece
Should attach the string to a spherical magnet at the top with another magnet outside the chamber and see if that difference in friction makes a difference in swing time.
This gives me hope for my scaled down Foucault Pendulum. You should try a longer thread (as long as fits) and use a controlled release (say an electric magnet) and see if you can measure the rotation of the earth. Your top attachment needs a bit of work though. It mustn't induce elliptical motion. That happens naturally anyway.
I subbed in Dr. Vantassell's physics AP calculus class this week, and in our lab we all did an experiment demonstrating the general form of simple harmonic motion using a vertical spring and weight, estimating the time of each cycle or rotation, by measuring the time and distance of each cycle using a differential equation. Quote: "time is just an estimate"
Thanks! This helped me with my science home work!!!👍
It’s nice that you shared this, technically why would you stop it before it’s completely motionless?
and also gravity slows it down
just saying
also i love your vids man!
+Drop Kingdom well gravity doesn't slow it down, gravity is what is making it keep moving. Gravity is just pulling it down, not slowing it down. In fact if you removed gravity and gave it an initial push, it wouldn't give the back and forth motion it would just try to swing in a circle around the attached point.
i think i should read physics again today cause gravity was the lesson for my exams tomorrow LoL
thanks for correcting me
love your vids
+Drop Kingdom glad you like them! Maybe your test will have the exact same question on it! 🙂
Put it to space station in vacuum chamber, think, it should spin forever!
Drop Kingdom u
Somebody may have made these comments already, but gravity pulls the pendulum straight down (stopping/slowing oscillation) more so than the friction of the string regardless of air resistance. If you were to graph the data from start to dead still, the delta would be much more visible. Suspending the bearing from a pair of strings, like that desktop toy with multiple balls, would contain the swing to one axis too. This would help gather data even more with the styrofoam demo.
If only I had read the top comment.
Enjoyable video, however, I would suggest using an electromagnet in the future because it may not make a huge difference but when your pulling the magnet away it still has an effect on the ball, while an electro magnet would not once the circuit is not functional
Wow That was amazing! l loved it!
Thanks!
you are welcome :)
awsome videos bro love you content keep it up
Cool videos here buddy. Did you build your own vacuum chamber (how?) or did you buy it (where?)?
A minor observation on your procedure: in the Styrofoam test the foam hit the sides on the first swing (and second in vacuum) thus dissipating some of the energy. Having the foam test done with a spacer holding the pendulum up that would fall free would likely provide more reliable results. Also as +Daniel Chavez and +Ahsan Ejaz observed the motion was not unidirectional. there may be, depending on how it was fastened, more friction in one direction than another.
Don't expect any drastic changes in outcome, but there are unaccounted for variables.
You already have the video . Good.
it would be cool to see a flame be put out in a vacume, what type of fire would not go out in a vacume? are fire and vacume chambers a bad combination?
no, the flame would just go out as it has no source of oxygen with which to burn
not true. Some burning materials don't need external sources of oxygen, as they contain it inside their molecules.
Guilherme Carbonetti. Well then that is not fire is it. It's just reacting.
That's what fire is a chemical reaction that requires oxygen
You need an "oxidizer" to maintain combustion. Oxygen is not the only such chemical.
Potassium nitrate releases oxygen when heated, making it a plausible candidate for a self-sustaining vacuum fire, depending on how quickly the oxygen diffuses away from the fuel.
From what I know of chlorine trifluoride, I wouldn't be surprised if it lit the vacuum chamber itself on fire.
Cool video. I wonder if your experiment might be better using a heavier (larger) steel ball and the longest pendulum that can fit in your chamber. Also you might be able to reduce the friction lost in the string by replacing it with a stiff rod that pivots on a knife edge (razor blade) resting on two flat steel plates, one on either side of the pendulum. Also I've wanted to make a newtons cradle in a vacuum for years but never had the time to try it.
Awesome video! I like it
Then I think Newton's 1st law may not be applicable in this case
It is applicable. The string tension is the force that brings the pendulum to rest after some time.
When i clicked on this I thought it said" Do penguins swing faster in a vacuum chamber?" ...well? do they?
😂😂😂
Man you are a genius
what about friction on connections with ball and the top of the box? If ıt is reduced to zero friction, would pendulum goes forever in the vacoomed space?
Yes
Can you trigger a blank bullet in the vacuum chamber? What will happen to the gunpowder?
I wish my science lessons were like this
Nice video and very interesting. I would love to see you putting an electronic device such as an iPhone inside your vacuum chanber and see what happens to it after it gets put under vacuum. Will the screen crack??? Or will it survive?
I think you should call string damping isnt it? And I guess not only the string but also where it is tied up too...
I couldn't get why you called it friction....
And what would happen in lower and higher temperatures ???
i think the energy lost is within the change in velocity causing friction within the rope. Definitely so as the rope causes a slight spring and twist to the pendulum's arc which causes an imbalanced change in momentum. i wonder if a different rope would have a different effect. And also im curious how the earth's rotation could influence a pendulum's arc
It was so cool to see it rotate under a vacuum. In air it basically maintained its linear path probably due to the air being forced around it, like a pingpong in a jetstream.. But in a vacuum it was free to rotate as the earth spins??
Also when you released in the vacuum the ball hit the top of the glass on the first back swing which took a lot of energy away.
+Hydraulic Press Action
if you take all of the air out of your vaccume chamber, and submerged it in water, would it float or sink?...
Golden Touch float
Vixmaster :p ay, but there's nothing in there. not even a gas.
Golden Touch .... A Vacuum is less dense than air which is less dense than water.
interesting
Every time he says 'vacuume chamber' it sounds like hes got the biggest grin on his face bahahahahah
For the ball on it's own, due to the aero dynamic nature of the ball, Its not the rope its not friction, its not air resistance, its the downward force of gravity in both vacuum and air.
With styrofoam. Its gravity and air resitance that slows it down in the air... it's gravity that slows it down in the vacuum
first of all, gravity, secondly, the vacuum pendulum started switching the directions it was swinging in, wasting a TON of energy because of the restrictive movement
Plz do an experiment to see if all the objects fall with the same speed
in vacuum. For example will a feather and an iron ball fall equally fast
when those are dropped inside vacuum, thanks!
really brilliant idea. technically should last forever, however, not a perfect vacuum. do it again with a better way to secure the wire
I think the issue with the test was that it actually hit the acrylic, losing a lot of potential and kinetic energy. To best test this, I think you would need at least a 2x2x4 chamber, hang the ball on a 1.8-1.9 foot string so it won't make contact with the walls, and start it about an inch from the lid/top. I think only then could we say the deciding factor here is friction.
Please please reply this can you fly drone in vacuume or make video on this
Why don't you put both vacuum/non vacuum time lapse next to each other for comparison?
I can't see how your rope is attached, so I don't know if it is a simple loop that is causing drag on a rod or it is just a fixed tied rope, but it seems odd to me that your pendulum would stop swinging in a good vacuum so quickly.
I think you've shown pretty well that air resistance (or lack thereof) isn't the major factor in causing your pendulum to lose energy. It seems odd to me that a fixed-tied rope would generate heat due to tension to cause your pendulum to slow so quickly in a vacuum. If you have a loop of string that is dragging on a rod with each swing, I'd be interested to see you use a magnetic bearing to determine how much longer the sphere would swing in such a condition.
I'd also be curious to see if most of the energy is lost in the beginning rather than at the end of the swing time. It seems to be a nonlinear loss of energy in your system. Can you measure the swing distance at 30 second intervals to see if the energy loss is greater at different times?
Nerds noticing a small issue be like
Unfortunately measuring the width wont give you accurate data since the pendulum doesn't just swing from left to right but also against you and away from you. The pendulum isn't restricted to a certain bath and you're measuring the width from the same angle. Try for instance to measure the width at 2:24 and 2:27, even though you know these measurements should be fairly identical, they wont be. You should have used two lines attached to the ball, like the balls in newtons cradle.
How about doing some electrical experiments in a vacuum chamber. You could start with just seeing how far the spark gap could be with no air resistance. It would be fun to explore the dynamics of vacuum tube technology.
I might be offending a few people by saying that this is such useless science and physics but dam! it is so freeking interesting.
Rafal Grabski useless ? Without physics u would Be living in tree houses dude and had no energy, current, TH-cam , a Smartphone , Fire etc
Please answer this question. Is there friction even if there are no particles ( Not even a single air particle) around? I hope not because the most recent definition of friction defines friction as a effect of electro-magnetic fore between two surfaces and if there is no surrounding particle then there should not have been frictional fore. But if this is the case then, why does google say there is friction in space?
Looks like most of the friction slowing the bare ball in the vacuum is the bolt holding the string. The string is rubbing against the nut and eating up the momentum.
Will friction on string by attachment make variation in time period??
What about a subwoofer (or woofer... something that fit the vacuum chamber). To get the same displacement for a low frequency of 20 Hz, the power required should be quite different.
Keep in mind that the coil may overheat quickly in vacuum, si the woofer may change motion as a warm coil increase resistance or it may generate smoke.
I think you should measure it from the side as well . It actually swings in more than one dimension.
I think the 'problem' (or "drawback") in his experiment - which is what means the pendulum doesn't swing 'perpetually' - is that it is, after all, only a 'miniature-scale model' and, therefore, due to its small size, the pendulum, in swinging downwards, does not have the same degree or measure of opportunity it would otherwise have if it were a gigantic pendulum attached to a 'towering' structure (like the Eiffel Tower!) to accelerate in a downward direction and, thereby, gather a lot of speed (having, also, been 'swung' from a 'high', horizontal 'starting position') before, finally, starting to swing back upwards again towards the top of the high-built, tall (as opposed to short, low-built and small-scale, relatively "non-accelerational" [in terms of total, 'penultimate' acceleration achieved]) pendulum-suspending tower!
I.e. (for the sake of 'analogy'), if you wanted to fire a 'pendulum-shaped' bullet upwards into the air which would travel out of a gun and into the air quickly (eg, at approximately "supersonic" speed!) you would have to, first, put a sufficient quantity of gunpowder behind the bullet inside the gun's chamber to make this degree of 'penultimate acceleration' of the bullet possible; then, the 'pendulum-shaped' bullet might reach into the air up to the height you wanted it to (eg, to "hit a target") before then re-descending or "falling back down again" (due to its gradual deceleration by gravity as it travelled upwards through the total distance of its upward motion)!
Could this, combined with elimination or reduction of 'resistance' to the motion of a pendulum (by, for example, putting a swinging pendulum in a vacuum to eliminate 'drag'), be the 'secret' or 'key' to the construction of a "perpetually swinging pendulum", 'free-energy' generating machine!?
NOTE: These 'comments', however, are "wishful thinking" (and "wrong"), are they not!?
can you now put a chaotic double pendulum in a vacuum?
I didn't understand the part in 3:09, we all taught that a pendulum never stops swinging in a vacuum. You said something about the friction of the swinging robe producing resistance? But the robe is in a vacuum right?
Friction isn't dependent on gravity,air ,stuff like that, it's just there ...always
Its not fully vacuum
How was the pendulum attached at the top?
Be interesting to see how much longer a golf ball would swing compared to a steel bearing since golf balls have the aerodynamic dimples. make them both the same weight so you don't have that deviation. Doubt it'd be different in the vacuum so do it in air.
Do sodium metal please.
A newtons cradle would be cool to see :)
I remember doing this in my school... we just do it in a little bit different way,,, and yes just like any other school you put formula to compute it,,, And yeah air resistance is too little too mind when it's just a small but heavy sphere...
At the start i have noticed that when you release it that it hits the upper plate on the first swing,did i see right?
wouldn't the major force acting on the pendulum be gravity which wouldn't be affected by being in a vacuum
What's is that pendulum made of?
Exploded Dynamic steel.
Can u test how a Gyroscope act in a Vacuum?
Hello! My theory is that if you put a gyroscope working with magnetic levitation in complete vacuum, it will last forever, because no friction is being developed! It is an experiment I always wanted to make, it would be awesome if you could give it a try!!
gyroscopes have friction
The noise at 2:10 is you putting the magnet down right?
I think you should get an MRE to review next.
I am pretty sure the gravity also acts as a damper. When the ball is moving away ftom its mean position the gravity is resisting it so i think gravity is the main reason for it to stop.
Bruh
is that really full vaccum?
No, full vaccum is virtually impossible to do, but it actually gets close to it. I think it lowers the pressure to about 30 mmHg which is about 25 times less pressure than normal (760mmHg)
air resistance doesnt apply when there is no air, if theres a difference i believe its due to gravity as the styrofoam adds more mass
Of course it is the left air that is the reason, the stings friction is the same in air and vacuum so it doesnt matter.
what song is this?? It's addictive
Please consider my ideas and like when you have read :D
Have some things to put in a vacuum chamber:
lightbulb
putty\slime
also *rotten* eggs(they have air in it)
balls like basketball, football, tennis ball etc.
coconut
uninflated and tied baloon
a perfume bottle for a better smell after the rotten egg
aero bars
a vacuum chamber
a better way to have done this was attach the pendulum at 2 points making a V with the string, it would stop it from going in circles and thus give you more accurate results
And The Legends says
That Pendulum is still moving..
Where can I find that background music?
well doh it will stop, gravity will stop it and also the friction with the connection point, the friction with air is a factor of course but that doesnt mean without air there are no other forces to slow the thing down
it's not just air resistance it's gravity to a vacuum chamber does not eliminate that
It should swing longer, and if it doesn't, it's most definitely racist.
Why motion of pendulum in vaccum is not perpetual, as there is no air drag in vaccum. Motion should go on.. right!?
Yes but no - friction
You should do this with a Newton’s cradle!!!
What happened if we placed newton cradle inside vacuum chamber...??
Is it forever in motion ..?
no because potential energy is lost when the balls collide
What happens if you change the temperature of the vacuum
Hey can you please try putting a fan in a vac
Cool, but predictable. No surprise ending.
The do- over. Take a pendulum more like a clock's pendulum. A broad flat disc and hinged so it can't turn sideways. In air, do it twice with the disc oriented parallel to swing and broadside to swing. Something like a silver dollar hung from 2 wires. Then in vacuum, but only once with it broadside to swing.
And use a longer radius. Instead of 5 minutes or something, show time until very small swings. The styrofoam was to bulky, it hit the far side of the tank. Even a small post-it note would've worked better.
I like your attempt for science, but there were too many factors to make this scientific, and did i hear it hit the lid when it was under vacuum?