"Why don't you stop." is me. Thank you so much, i thought it sounded stupid so i didn't ask my teacher (like most questions i ask myself) but now i understand that its the acceleration that stops and not the velocity, i literally understand the whole topic now.
SilverSophia Exaclty. If the net force is zero, that means that the acceleration is zero. But it does *not* mean that the velocity has to be zero zero. If it is moving, it will keep moving.
it's also the second law of motion that applies here. If the net force is zero, that means that the *acceleration* is zero, but it doesn't mean the velocity is zero. If it's moving, and the net force is zero, then it doesn't slow down. A force would be needed to slow it down.
Yes, such that the sum of Forces = Drag - Weight = 4.9 N - 4.9 N = 0, although it wouldn't mean it would "stop", it only means that it's not accelerating anymore.
I think one way to explain would be to say...ur in ur car..u floor the accelerator pedal..when it gets to final gear and max Rpm's then u cant accelerate anymore..but still moving
Search Results - According to Einstein's theory of relativity, gravity is not pulling us down but space is pushing us down. Due to higher altitudes the density of air changes thus affecting velocity, correct? Does this change cause gravity to become weaker or does it remain constant?
Gravity is a constant of each planet or object. So, in Earth gravity will remain being 9.8m/s^2. The change of density in air doesn't change gravity, but the higher the density of the air, more force is applied by it. So acceleration will decrease.
How do you measure the terminal object of something? If you reach terminal velocity can you go slower without parachute or it depends on the wind? Thanks. I hope someone answer.
At the beginning of the fall you are accelerating at 9.8 m/s^2, but as your speed increases, the drag increases, so the value of "a" gradually slows. You still accelerate, but at a slowing rate, until you reach 9.8 m/s^2.
In theory, I believe you could. But you would also need to know the density of the air (and how the density changes with altitude) and the drag coefficient of the object. If you are thinking of this as a fluid mechanics problem, the math can get pretty advanced.
+Basma Mamdouh when a body falls it experiences air resistance and that resistance becomes greater as the velocity increases (note: the free fall value is 9.8m/s^-2). And eventually acceleration becomes zero because the body is now falling at a constant velocity. The net force is zero because it is a constant velocity is my understanding of it.
Because, when net force equal zero, the acceleration is equal 0, not the velocity. The velocity depends on how much it takes the acceleration to reach 0. And that depends on the density, gravity etc...
because Newton's first Law - "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." when the the two forces cancel each other out the acceleration becomes zero but the velocity that the object has previously gained remains the same unless the resistance of air is increased than the weight object, then it would decrease the velocity of the object. for practical example when you through an object in space it will keep moving at a certain velocity even if no force is constantly pushing it just like that when the two forces cancel each other out it becomes a space like environment the object will not accelerate but it will not loose its velocity that it has previously gained.
The maximum constant velocity reached by falling object in the presence of air resistance. It is reached when the gravitational attraction of the earth downwards is equal to the air resistance upwards.
so the air resistance will make the force same with our weight, but what if i jump and in vacuum, means no air resistance? do i keep accelerating forever?
Well you need a heavy object, inflicting gravitational force on you, dragging you to its center. If you had a tube from the surface of earth into space, with a vacuum in it you would keep accelerating at a constant rate until you hit the surface. If you were to be in space put into a certain position without any initial movement you would have little gravitational forces acting upon you. But if any object would be close enough to pull on you your acceleration would slowly start to increase until the surface impact or its atmosphere stops you. There is unfortunately no way to accelerate an object infinitely using gravity in space without adding extra directional energy.
Has there ever been any object so heavy and aerodynamic that its terminal velocity is above the sound barrier? (In a normal atmosphere, not like high up in space)
Not sure about that happening in normal atmosphere. It can definitely happen at high altitude. Joe Kittinger jumped from a balloon at something like 80,000 feet. He was the first person to break the speed of sound without an aircraft or space vehicle.
+Crusaders Productions Terminal velocity is most commonly discussed in the context of an object falling in air, but the same idea could apply in other scenarios. An aircraft pilot, for example, could throttle up to full throttle, and the plane would accelerate, and the acceleration would gradually decrease as the drag increased, and the plane would approach terminal velocity.
+Derek Owens Sorry to disturb, I'm just curious. So what if the object has a initial speed faster than its terminal velocity (Is that possible? If so, what happens)
+Seng YeChuan Great question. If the initial speed is faster than the terminal velocity, then the drag force will be greater than the weight, and the object will slow down. It will slow down until it reaches terminal velocity.
The altitude of the falling object would have a substantial impact on its terminal velocity, wouldn't it? If one is located at around 15,000 feet (the peak altitude of a typical skydive), the air pressure is around half of what it would be at the surface. Why was this not mentioned in the video?
Yes, absolutely. At very high altitude, the air is much less dense, so there would be substantially less drag, resulting in a much higher terminal velocity. This video is just introducing the concept in a course aimed at 8th or 9th grade students, so we don't go into great depth, but it is a valid point and one that I think is not too difficult to understand, so it could certainly be mentioned here.
I've got a weird question. In SF stories I will occasionally come across a scene where the hero is on the Moon or Mars or some extrasolar planet or whatever and is in danger of falling a great distance. It will be pointed out that "falling six hundred feet on the Moon will kill you just as surely as falling one hundred feet on Earth" or some such. But would it? I'm not knowledgeable enough to figure this out myself, but what it boils down to is: assuming some gargantuan air-filled structure on the Moon, would terminal velocity be the same as on Earth, but you have to fall six times as far to reach it? In this case then yes, falling six hundred feet will kill you just as surely as falling one hundred feet on Earth. Or would terminal velocity on the Moon (again, assuming a large air-filled structure) be one-sixth of what it is on Earth, that is about 20 MPH? In this case Our Hero can jump from a mile-high skyscraper and land safely. Well, he'd have to roll or something, or better yet land in water.
Well, not necessarily. I was flying with a friend in a small Cessna. I put my hand out the window while were moving at 140 knots. It took some real effort to hold my hand in place against the force of the wind, but it was doable at 140. In a commercial airliner at 700 knots it would be a different story, though. I'm keeping all body parts inside the craft while on a commercial flight. Not going for a stroll on the wing or anything like that.
I have a thought on this. I do know that when Joe Kittinger jumped from a balloon at around 80,000 feet or so, that he was the first person to exceed the speed of sound without and aircraft or a spacecraft. So it's possible in free fall, if you are up where the air is thin, to get up enough speed to exceed the speed of sound. I'm not sure about the 3x figure, though.
When you deploy the parachute, you are increasing the force of drag. Eventually, you return to a new, smaller terminal velocity once you have deployed the parachute for a while. As there is an increase in drag opposing the object's motion, surely there would be an increase in the gravitational pull on the object? As they would have to equal one another in order to be in terminal velocity.
I'll try to help. The increase in drag when the chute opens will not result in an increase in gravity. Instead, it results in a change in the velocity. This change in v, or acceleration, will *feel* like gravity, but the gravitational pull of the earth does not change noticeably due to the opening of the parachute.
@@derekowens Since it feels like gravity, it mimics a decrease in the weight of the object - Which in turn decreases its terminal velocity. Is that right?
@@matishparmar1933 Weight is not changing. Terminal velocity is when the drag force is equal to the gravitational force. There are several factors that determine the force of drag. The two that are important to your question are 1) velocity through air, and 2) Cross section surface area. Terminal velocity is reached when the drag force and gravitational force are balanced. If they are not balanced, you will accelerate in the direction of the greater force until they are balanced. When you first jump out of an airplane, the drag force is zero and the gravitational force is whatever it is (it doesn't change). You are accelerated downward and the faster you go, the greater the force of drag - because your velocity is increasing. Assuming you aren't changing the orientation of your body, your cross section surface area is not changing. The drag force is increasing because your velocity is increasing. So long as the gravitational force is greater than the drag force, you will continue to accelerate - getting faster and faster which causes the drag force to get greater and greater. The rate at which you accelerate will decrease because that drag force is getting closer and closer to the gravitational force, so the NET force gets smaller and smaller. Once you are going fast enough, the drag force and gravitational force are in balance, and acceleration stops. You have reached the terminal velocity for your current configuration. When you open the parachute, you have drastically changed one of the factors that determines the force of drag : your cross section area. Your drag force is now suddenly greater than the gravitational force, so you will again accelerate, but this time in the direction of the greater force - which is drag - which is upward. You will now accelerate upward - which decreases your velocity - which decreases the force of drag until it again equals gravity - at which point you will again stop accelerating and will have reached a new, slower terminal velocity. The force of gravity (your weight) never changed.
@@selena8607 drag force depends on the velocity through the air. The drag force works to alow the skydiver down. While the drag force is greater than weight, it will accelerate the di er upwards, but the driver has velocity downwards, so it merely works to SLOW DOWN the fall of the skydiver. Once the parachute has slowed down the fall to the point where drag equals weight, then all acceleration stops and the skydiver descends at a constant velocity - a terminal velocity.
You would keep accelerating until you hit the planet. The only thing that can accelerate things to light speed are black holes due to their strong gravity.
Niranjan Wagh in theory, yes a long enough duration in a strong enough gravitational field will accelerate you to .99999% the speed of light. Remember that objects with mass can never reach light speed. However in practicality, to reach light speed you would have to be falling for a very long long time, meaning you would have to be very far from the planet. And the farther you are from the planet, gravity gets exponentially weaker until it’s affects are negligible. You would have to have a gravitational field that stretches for several light years in order to get to that speed, and the only thing with gravity that strong is a black hole
You can't actually do that. But ***if*** there were a hole all the way through, then you could drop an object from one side of the earth, and it would take approximately 42 minutes for it to "fall" through to the other side. This scenario is science fiction, though. One could not drill a hole through the earth because it is molten rock and metal inside, too hot, and whatever you were drilling with would melt. Also, the scenario that we envision, with a rock falling through this supposed hole, assumes that the earth is not rotating, which is a false assumption. The rotation, along with the law of conservation of momentum, would cause the dropped object to strike the side of the hole on the way down. That's all just off the top of my head so someone correct me if I'm wrong.
Derek Owens But isn't terminal velocity only 120 mph, that's the bit that is confusing me? or would you speed up the closer you got to the center of earth?
Ollied Yes, approximately 120 mi/hour for a person. The scenario of falling through the earth in 42 minutes assumes no air resistance. So in yet another way it is not a realistic scenario, but it is an interesting one to think about from a physics standpoint.
Terminal velocity. If u think then its is different in water and other gases. The ressistance is tpdifferrent right. And u could in theory reach terminal velocity horizontaly or in any direction. Right?
Yes, it will be different in different fluids. And the fluid mechanics is different for compressible fluids (gases) compared to non-compressible fluids such as water. And that is correct that you could have terminal velocity in any direction. A large ship can throttle up its engines and it will accelerate until it reaches terminal velocity. In that context we usually just call it "top speed", but it's same idea.
Velocity is just speed. So when you drive a car you can decrease your velocity by pressing the brakes. Decreasing the velocity in a falling object he explained when he talked about sky divers spreading their body open to increase the wind reststance, which in turn decreases their velocity.
That's right. A more streamlined object will typically have a higher terminal velocity. And a heavier object will also typically have a higher terminal velocity. It's the ratio of weight to drag that matters.
know this is a ten year old video, but just wanted to tell you that shooting at incoming enemy soldiers who are in the air and havent hit the ground was deemed a war crime in 1949 and immediately punishable by life. It was taken pretty seriously amongst each soldier relative to each other
Have you ever heard the phrase "All if fair in love and war"? And have you also read stories in the past and hear stories that still happen today about people killing innocents, raping prisoners, recruiting child soldiers and forcing citizens into armies at the threat of the death of their families? Yeah that still happens. Which means that rules be damned in war. And some groups in the world don't recognize any rules they didn't make up. Long story short, you may get shot out of the sky if you fall too slowly in a battle.
this video literally just shows off this guys drawing skills
Sorry u cant understand..art has nothing to do with understanding physics..its simply used to help people see what is meant
fair enough, but when u need to understand physics, u need to have a clear visual which is good drawing skills
@@adamnoe4656 I think they’re making a joke.
@@whar3567 true
"Why don't you stop." is me. Thank you so much, i thought it sounded stupid so i didn't ask my teacher (like most questions i ask myself) but now i understand that its the acceleration that stops and not the velocity, i literally understand the whole topic now.
"If the Net force is zero, why don't you stop?"
INERTIA.
SilverSophia Exaclty. If the net force is zero, that means that the acceleration is zero. But it does *not* mean that the velocity has to be zero zero. If it is moving, it will keep moving.
Derek Owens aka Newton's First Law of Motion
it's also the second law of motion that applies here. If the net force is zero, that means that the *acceleration* is zero, but it doesn't mean the velocity is zero. If it's moving, and the net force is zero, then it doesn't slow down. A force would be needed to slow it down.
Lotus12 thanks cuz I was like something is missing. I can’t learn something properly unless I catch everything at least once... thanks
Zero acceleration not zero velocity
Thank you. Coherent and great drawings :)
Only problem I have as of now is my increased excitement to go skydiving....
so if the weight of an object is 4.9 N the air resistance force at terminal velocity would be 4.9?
YES
4.9 newtons.
Yes, such that the sum of Forces = Drag - Weight = 4.9 N - 4.9 N = 0, although it wouldn't mean it would "stop", it only means that it's not accelerating anymore.
I think one way to explain would be to say...ur in ur car..u floor the accelerator pedal..when it gets to final gear and max Rpm's then u cant accelerate anymore..but still moving
That roll that you mentioned that military personnel perform is called a PLF.
Parachute Landing Fall.
*father was Airborne Jumpmaster
Just understood the meaning of terminal velocity!!! Thank you so muchhhh
Search Results - According to Einstein's theory of relativity, gravity is not pulling us down but space is pushing us down.
Due to higher altitudes the density of air changes thus affecting velocity, correct? Does this change cause gravity to become weaker or does it remain constant?
Gravity is a constant of each planet or object. So, in Earth gravity will remain being 9.8m/s^2. The change of density in air doesn't change gravity, but the higher the density of the air, more force is applied by it. So acceleration will decrease.
Actually gravity is not constant. It decreases with altitude and increases with latitude.
Aaron Alfer well yeah that’s because gravity is getting weaker.
How do you measure the terminal object of something? If you reach terminal velocity can you go slower without parachute or it depends on the wind? Thanks. I hope someone answer.
So you fall 9,8 m/s/2 until you reach the terminal velocity?
At the beginning of the fall you are accelerating at 9.8 m/s^2, but as your speed increases, the drag increases, so the value of "a" gradually slows. You still accelerate, but at a slowing rate, until you reach 9.8 m/s^2.
+Edvinas Senda You are correct. Eventually a = 0, not 9.8 m/s^s, and your velocity is at the terminal velocity. Thanks for the correction.
Could I calculate gravitational force with terminal velocity assuming that said object was falling to earth?
In theory, I believe you could. But you would also need to know the density of the air (and how the density changes with altitude) and the drag coefficient of the object. If you are thinking of this as a fluid mechanics problem, the math can get pretty advanced.
Derek Owens Okay, thanks!
Thank you for for what you've done 9 years ago😃
I didn't understand why we don't stop when the net force equal zero ???
+Basma Mamdouh when a body falls it experiences air resistance and that resistance becomes greater as the velocity increases (note: the free fall value is 9.8m/s^-2). And eventually acceleration becomes zero because the body is now falling at a constant velocity. The net force is zero because it is a constant velocity is my understanding of it.
Because, when net force equal zero, the acceleration is equal 0, not the velocity. The velocity depends on how much it takes the acceleration to reach 0. And that depends on the density, gravity etc...
because Newton's first Law - "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." when the the two forces cancel each other out the acceleration becomes zero but the velocity that the object has previously gained remains the same unless the resistance of air is increased than the weight object, then it would decrease the velocity of the object. for practical example when you through an object in space it will keep moving at a certain velocity even if no force is constantly pushing it just like that when the two forces cancel each other out it becomes a space like environment the object will not accelerate but it will not loose its velocity that it has previously gained.
what could be the possible definition for terminal velocity???
The maximum constant velocity reached by falling object in the presence of air resistance. It is reached when the gravitational attraction of the earth downwards is equal to the air resistance upwards.
Let us Google that for you
so the air resistance will make the force same with our weight, but what if i jump and in vacuum, means no air resistance? do i keep accelerating forever?
+Samad Said yes.
Yessss i was thinking of the same thing!!!
Well you need a heavy object, inflicting gravitational force on you, dragging you to its center. If you had a tube from the surface of earth into space, with a vacuum in it you would keep accelerating at a constant rate until you hit the surface. If you were to be in space put into a certain position without any initial movement you would have little gravitational forces acting upon you. But if any object would be close enough to pull on you your acceleration would slowly start to increase until the surface impact or its atmosphere stops you. There is unfortunately no way to accelerate an object infinitely using gravity in space without adding extra directional energy.
Very well explained...
I just experienced it while u were explaining.... so good. :)
Has there ever been any object so heavy and aerodynamic that its terminal velocity is above the sound barrier? (In a normal atmosphere, not like high up in space)
Not sure about that happening in normal atmosphere. It can definitely happen at high altitude. Joe Kittinger jumped from a balloon at something like 80,000 feet. He was the first person to break the speed of sound without an aircraft or space vehicle.
Man you're a great explainer... great Video!
Is terminal velocity only for falls or to everything when you are exposed to air?
Like a bullet, does it have a terminal velocity?
+Crusaders Productions Terminal velocity is most commonly discussed in the context of an object falling in air, but the same idea could apply in other scenarios. An aircraft pilot, for example, could throttle up to full throttle, and the plane would accelerate, and the acceleration would gradually decrease as the drag increased, and the plane would approach terminal velocity.
I see... thanks
+Derek Owens
Sorry to disturb, I'm just curious.
So what if the object has a initial speed faster than its terminal velocity (Is that possible? If so, what happens)
+Seng YeChuan Great question. If the initial speed is faster than the terminal velocity, then the drag force will be greater than the weight, and the object will slow down. It will slow down until it reaches terminal velocity.
Derek Owens
Ohh I see.
Thanks it really helped!
Appreciate it :)
you didn't explain about the force of falling if net force is zero. where does the force of falling stand in the net force?
Is this act 3?
The altitude of the falling object would have a substantial impact on its terminal velocity, wouldn't it? If one is located at around 15,000 feet (the peak altitude of a typical skydive), the air pressure is around half of what it would be at the surface. Why was this not mentioned in the video?
Yes, absolutely. At very high altitude, the air is much less dense, so there would be substantially less drag, resulting in a much higher terminal velocity. This video is just introducing the concept in a course aimed at 8th or 9th grade students, so we don't go into great depth, but it is a valid point and one that I think is not too difficult to understand, so it could certainly be mentioned here.
So helpful. Thank you. Clear explanation.
Thankyou so much. I understand a lot of things I had doubt before.
I'm also curious about the wing on my car. Is it creating drag, reducing the top speed of my car?
Most spoilers are designed to force the back end of your car down - increasing the grip on the road.
fantastic video, explained so simply. awesome
what is your speed in a wing suit?
I've got a weird question.
In SF stories I will occasionally come across a scene where the hero is on the Moon or Mars or some extrasolar planet or whatever and is in danger of falling a great distance. It will be pointed out that "falling six hundred feet on the Moon will kill you just as surely as falling one hundred feet on Earth" or some such.
But would it? I'm not knowledgeable enough to figure this out myself, but what it boils down to is: assuming some gargantuan air-filled structure on the Moon, would terminal velocity be the same as on Earth, but you have to fall six times as far to reach it? In this case then yes, falling six hundred feet will kill you just as surely as falling one hundred feet on Earth.
Or would terminal velocity on the Moon (again, assuming a large air-filled structure) be one-sixth of what it is on Earth, that is about 20 MPH? In this case Our Hero can jump from a mile-high skyscraper and land safely. Well, he'd have to roll or something, or better yet land in water.
Such a good video!
Awesome video! Thanks!👏🏽✨👍🏽
Nice video on terminal velocity.
So if I’m in a plane and I put my hand out a window is bye bye hand right
Well, not necessarily. I was flying with a friend in a small Cessna. I put my hand out the window while were moving at 140 knots. It took some real effort to hold my hand in place against the force of the wind, but it was doable at 140.
In a commercial airliner at 700 knots it would be a different story, though. I'm keeping all body parts inside the craft while on a commercial flight. Not going for a stroll on the wing or anything like that.
Then why do they say when you fall from space you are going 3x the speed of sound?? I don’t understand??
I have a thought on this. I do know that when Joe Kittinger jumped from a balloon at around 80,000 feet or so, that he was the first person to exceed the speed of sound without and aircraft or a spacecraft. So it's possible in free fall, if you are up where the air is thin, to get up enough speed to exceed the speed of sound. I'm not sure about the 3x figure, though.
I simply came here for the ending. I didn’t understand why people don’t literally float when the air resistance is equal to your weight
Ok but...
Can it outrun a BLACK HOLE?!
When you deploy the parachute, you are increasing the force of drag. Eventually, you return to a new, smaller terminal velocity once you have deployed the parachute for a while. As there is an increase in drag opposing the object's motion, surely there would be an increase in the gravitational pull on the object? As they would have to equal one another in order to be in terminal velocity.
I'll try to help. The increase in drag when the chute opens will not result in an increase in gravity. Instead, it results in a change in the velocity. This change in v, or acceleration, will *feel* like gravity, but the gravitational pull of the earth does not change noticeably due to the opening of the parachute.
@@derekowens Since it feels like gravity, it mimics a decrease in the weight of the object - Which in turn decreases its terminal velocity. Is that right?
@@matishparmar1933 Weight is not changing. Terminal velocity is when the drag force is equal to the gravitational force. There are several factors that determine the force of drag. The two that are important to your question are 1) velocity through air, and 2) Cross section surface area.
Terminal velocity is reached when the drag force and gravitational force are balanced. If they are not balanced, you will accelerate in the direction of the greater force until they are balanced. When you first jump out of an airplane, the drag force is zero and the gravitational force is whatever it is (it doesn't change). You are accelerated downward and the faster you go, the greater the force of drag - because your velocity is increasing. Assuming you aren't changing the orientation of your body, your cross section surface area is not changing. The drag force is increasing because your velocity is increasing. So long as the gravitational force is greater than the drag force, you will continue to accelerate - getting faster and faster which causes the drag force to get greater and greater. The rate at which you accelerate will decrease because that drag force is getting closer and closer to the gravitational force, so the NET force gets smaller and smaller. Once you are going fast enough, the drag force and gravitational force are in balance, and acceleration stops. You have reached the terminal velocity for your current configuration. When you open the parachute, you have drastically changed one of the factors that determines the force of drag : your cross section area. Your drag force is now suddenly greater than the gravitational force, so you will again accelerate, but this time in the direction of the greater force - which is drag - which is upward. You will now accelerate upward - which decreases your velocity - which decreases the force of drag until it again equals gravity - at which point you will again stop accelerating and will have reached a new, slower terminal velocity. The force of gravity (your weight) never changed.
@@willoughbykrenzteinburg if air drag force is greater than weight,why wont it make sky diver flying?
@@selena8607 drag force depends on the velocity through the air. The drag force works to alow the skydiver down. While the drag force is greater than weight, it will accelerate the di er upwards, but the driver has velocity downwards, so it merely works to SLOW DOWN the fall of the skydiver. Once the parachute has slowed down the fall to the point where drag equals weight, then all acceleration stops and the skydiver descends at a constant velocity - a terminal velocity.
what if there is no air? means we are in space. we will keep accelerating to light speed ?
You would keep accelerating until you hit the planet. The only thing that can accelerate things to light speed are black holes due to their strong gravity.
@@captainshipman7377 what if I never hit the planet or anything? What will be the max velocity then?
Niranjan Wagh in theory, yes a long enough duration in a strong enough gravitational field will accelerate you to .99999% the speed of light. Remember that objects with mass can never reach light speed. However in practicality, to reach light speed you would have to be falling for a very long long time, meaning you would have to be very far from the planet. And the farther you are from the planet, gravity gets exponentially weaker until it’s affects are negligible. You would have to have a gravitational field that stretches for several light years in order to get to that speed, and the only thing with gravity that strong is a black hole
Can someone explain to me how you can travel through the core of the earth from one side to the other in 42 minutes
You can't actually do that. But ***if*** there were a hole all the way through, then you could drop an object from one side of the earth, and it would take approximately 42 minutes for it to "fall" through to the other side. This scenario is science fiction, though. One could not drill a hole through the earth because it is molten rock and metal inside, too hot, and whatever you were drilling with would melt. Also, the scenario that we envision, with a rock falling through this supposed hole, assumes that the earth is not rotating, which is a false assumption. The rotation, along with the law of conservation of momentum, would cause the dropped object to strike the side of the hole on the way down. That's all just off the top of my head so someone correct me if I'm wrong.
Derek Owens But isn't terminal velocity only 120 mph, that's the bit that is confusing me? or would you speed up the closer you got to the center of earth?
Ollied Yes, approximately 120 mi/hour for a person. The scenario of falling through the earth in 42 minutes assumes no air resistance. So in yet another way it is not a realistic scenario, but it is an interesting one to think about from a physics standpoint.
ah ok this makes perfect sense now, thanks
suppose there is a hole, then supposedly you can travel.
So? ....in a vacuum there is NO terminal velocity? .... you just keep accelerating?
Without gravity you can't fall. And if you can't fall then there's no force pulling you to the earth.
Terminal velocity. If u think then its is different in water and other gases. The ressistance is tpdifferrent right. And u could in theory reach terminal velocity horizontaly or in any direction. Right?
Yes, it will be different in different fluids. And the fluid mechanics is different for compressible fluids (gases) compared to non-compressible fluids such as water.
And that is correct that you could have terminal velocity in any direction. A large ship can throttle up its engines and it will accelerate until it reaches terminal velocity. In that context we usually just call it "top speed", but it's same idea.
Thanks man, great explained
6:13 really needed that
If you have a superpower that can make portals you could punch somebody really hard if you reach terminal velocity
Thank you ,very informative.
Sounds like an intelligent version of George W Bush.
ouch lmao
only possible in an alternative universe, and they don't exist.
Way to bring politics and personal opinion into physics...good job
@@adamnoe4656 there have always been politics and opinions in physics, it's a human activity.
Great so how fast will I fall if I jump fron my 8th story apartment window? I want to make it's fast enough to be painless.
can u decrease ur velocity
Velocity is just speed. So when you drive a car you can decrease your velocity by pressing the brakes.
Decreasing the velocity in a falling object he explained when he talked about sky divers spreading their body open to increase the wind reststance, which in turn decreases their velocity.
great video!
4:55-5:33 was prettttty irrelevant.
icaledshotgun that is pretty true
True but it was interesting.
icaledshotgun you could be asked a question about it, i found it pretty useful
So the more streamline the object is and bigger its weight. The higher terminal velocity will be. Oh well im only twelve. XD
That's right. A more streamlined object will typically have a higher terminal velocity. And a heavier object will also typically have a higher terminal velocity. It's the ratio of weight to drag that matters.
Hello, very nice video but next time please use metric :(
Awesome
great... just great
thank u so much,i was considering about the last point if it is is 0 why dont it stop but now realized it still accelerate tnqq
Great video, thanks
Cool
your arrows aren't straight but good video
learned during pubg
😎🙏
Whos here from a golf ball?
know this is a ten year old video, but just wanted to tell you that shooting at incoming enemy soldiers who are in the air and havent hit the ground was deemed a war crime in 1949 and immediately punishable by life. It was taken pretty seriously amongst each soldier relative to each other
Have you ever heard the phrase "All if fair in love and war"?
And have you also read stories in the past and hear stories that still happen today about people killing innocents, raping prisoners, recruiting child soldiers and forcing citizens into armies at the threat of the death of their families? Yeah that still happens. Which means that rules be damned in war. And some groups in the world don't recognize any rules they didn't make up.
Long story short, you may get shot out of the sky if you fall too slowly in a battle.
Damn- I've never heard of that
cos omac
Jp album
uwu