Thanks from this 65 year old elementary school student. This is the kind of lesson your students will remember for a lifetime. Visual, fun, memorable. My high school physics teacher told us after a few weeks of teaching us: "A little knowledge is a dangerous thing - you guys have nothing to worry about".
medicineman007 Hi Medicineman007, thanks for the support. That's a good question and I have no idea. My goal has always been to let students see and experience some of the concepts of science for themselves, after that I can only hope that the interest grows. This will be my 39th year of teaching and I still love it.
My daughter is 15... 10th grade. I wish she had teachers like you. You really impact lives and give them hands on learning that they will remember forever. When you make learning fun, you make it memorable. Thank you for what you do.
Awesome and engaging lesson for your students. You are the kind of teacher kids remember their entire lives. Great job seizing on the opportunity to explain the 7:1
I was searching for pulley system to roll an engine out of the bed of my truck and stumbled on this video. Practical science should be taught in every school.
Sir, you are an amazing Teacher. Practical experience, fun and physics. This should be a project for every student throughout the world. You could make it different, but you couldn't make it better. This is such an inspiration. This is the joy of teaching. Thank you so much :) Physics is just normal life. Your practical explanation of pulleys makes this accessible to everyone, it's so easy to understand when you do the experiment and when your teacher explains the obvious. Bruce Yeany, you are my hero of the week. My physics expertise was a product of hard work and my autodictactic skills. If only I had had a teacher like you. You are one in a million. I'm sure that many of your students will have had their lives changed (for the better) because of your love of sharing expertise in a practical, easy-to-understand way. If I were Prime Minister of the UK, I would appoint you to lead and design UK Science teaching for the next generation(s). Wonderful :) P.S. The brake is just genius. P.P.S. If it were possible to vote for the Best Video that you have viewed this year, your video would get my vote. Inspiring.
sbzerski, Thank you for the kind words and certainly appreciate hearing from you. I've spend a lifetime trying to find the best ways for making physics concepts easier to understand. I've had a lot of help along the way and I'm happy to share what I've learned
I am Indian... ❤️❤️ I like this system to study.. Really it show the students practically... Thank you sir . To see the video , the students have clear concept of pully systems. 😊
Thanks for showing me this. My wife and I have had a tough time getting my wheelchair in our suv. I knew there was a diy pulley system I could use I just didn't know what. Thanks again. Tell students great job.
Just wanted to say thanks for this video! I've used it every year with my grade 5s for the last 4 years! It makes these concepts SO much easier to understand for them!
With a mechanical advantage of 2 you aren't pulling twice the distance to move the load half the distance, you're pulling twice the distance to get the load to move the same distance, or pulling the same distance to get the load to move half the distance.
You're awesome teacher! Thanks for showing your students something that they can relate to/apply in the real world instead of just teaching out of a book! A++
Hey Mr. Yeany it’s awesome to see how far your channel has come your sub count is double what it used to be when I was your student you were a great science teacher. It’s funny to see myself on this video brings back great memories, I hope you’re doing well take care of yourself
Sir. Thank you. I am building the best system for storing my jeeps hard top on the ceiling just using my own power and factoring in ease of use. I learned that for all I thought I knew, I knew nothing of value that could help me do that. I appreciate you walking through this and wish you continued success.
An inspired teacher. This is called active learning. If you want to teach someone such physical things, allow them to use their hands ... they will be able to solve problems faster and in a fun way. Laughter lets the learning juices flow.
MANNNNN WHERE WERE U ALL MY 12 YR OF SCHOOLING. MAN I GREW UP IN LOS ANGELES NEVER HAD TEACHER LIKE U, SEEMS LIKE WE NEVER HAD THIS MUCH FUN LEARING , THANKS FOR ALL U DO , LOVED TO HAD U AS MY TEACHER,
the rope goes through a tube which feeds it into the first pulley, this tube is like a lever and can pivot at the one end closest to the pulley. When you angle the rope and this tube upwards, that tube pinches it against the rope against the pulley wheel and keeps it from feeding into the pulley, to release it you pull don and the rope and the rope is free to move again
Correct me if I'm wrong, but I believe the angle of the applied force gives the principle an advantage as opposed to the students pulling at more extreme angle. Great videos. I wish all high school science teachers were as demonstrative as yourself. Keep it up!
Good - very good - engaging exercise that will never leave their minds, no matter how much or how little they understand it; they know there's something there! Which they can explore more later. I think the stress on the rope with the increased advantage is similarly lessened. You're still pulling on the railing just as hard and the pulleys may be taking some stress but the rope is dividing the load (according to how many strands are pulling up from the object being lifted) and doesn't need to be as strong / stressed.
Hi. Thank you for this video and I was able to know what to do now. We are moving and we are at the 4th floor and the the stairs is imposible to use. What type of pulley is that? I need to buy that.
Sir thanks for helping me to explain working of pulleys in such a easy way. May I ask for your help for balancing weight on lever. can you help me in making working model of lever.
Hello sir. Could you please explain if there is a "rule of thumb" as to how to know what the mech-advantage is in any system? Is a fixed pulley only consideted as a change of direction?
In this case the mechanical advantage is equal to the number of ropes that are directly supporting the load. Whatever force is applied to the rope that you are pulling on is increased by that amount, minus the force lost to friction. IT also means that you while you are gaining force, you are losing distance by the same rate. So, four support ropes means you will increase your force by a factor of four, but you will need to pull four times further
Dankie/ Merci mister/ teacher. It helps a lot. The trolleys look so simple? I build a hoist with a pully (2x3) that can lift 450kg. When I shift the center of the hoist with 1m the lifting pulley can only lilt a max. of 50kg. So in this way I'll have to get a (2x5) pulley system. Thx.
I want 1 rope to have a similar setup to the last example...but I want 4 pulleys on each corner and to have a square with the ropes rather than a triangle as in most of these examples. How to do this? How many pulleys? I can calculate the weight etc I just don’t know how to set it up. Thanks
I guess a good way to describe what I want to do is....imagine pulling a rope attached to an elevator...at least 4 pulleys on all corners would be required...the pyramid type would tend to swing more and easier....but a square wouldn’t as much.
Thanks for sharing, I had some trouble understanding the concept and glad to see someone, I'm able to understand and learn from. Also, I didn't know how to do the two pulley system, but now I do. :D
We do. It is called the gear system. By selecting a lower gear setting, you trade speed for torque. This enables you to climb a steep hill by pedalling a lot of revolutions to reduce the force you need to apply to the pedal. It still is the same power, just re-formatted to trade torque and speed.
Hello Sir, I am a student of grade 9. I really enjoy your educational videos and makes me eager to learn more science. It is fascinating to see how interested in physics you are and helping your students to understand physics easily. Thanks a lot Sir, and keep making more such videos!
Hello from the future: I actually had to travel 5 times into the past to view this video :D. You could have really impressed the students by making it so easy that the handicapped boy could have participated, by either pulling it physically or towing it.
eBay, amazon craigslist, harbor freight, or other tool outlets. do a search for pulley sets or block and tackle. I purchased mine from eBay as a used set.
I took physics in high school. now in college. needed a little review on fixed pulley systems and work ratios and this was immensely helpful. Thank You!
You can't do that to the lifting force, but you can do that with the supporting force. Look up the capstan equation. The tension needed to hold a load stationary is an exponential function of how many turns you wrap the rope around a fixed cylinder called a capstan.
What's the name of the item use to stop the rope??? I know they're " The brakes ", but what's the actual name. Can I go to a store and ask if they have pulley brakes? I'm Googling pulley brakes and it seems to not know what I'm talking about it just shows random stuff that's why I ask.
I loved your passion to share with the kids. Now lets change the circles diameter, so you have to pull less. I saw a documentary once about the Eiffel tower initial elevator was using this principle.
When I think about scientific principles like this I always correspond them to jobs. One pulley of force = the laborer carrying concrete bags for a paycheck. 16 pulleys of force = the engineer calculating the number of concrete bags needed for a much bigger paycheck. The first takes less time due to the 1:1 ratio but requires more physical force while the second requires 16x more time but requires 16x less physical force. Much respect to each of those professions though.
Thanks from this 65 year old elementary school student. This is the kind of lesson your students will remember for a lifetime. Visual, fun, memorable. My high school physics teacher told us after a few weeks of teaching us: "A little knowledge is a dangerous thing - you guys have nothing to worry about".
I wonder how many students you've inspired over the years to pursue a love of learning and exploration. Great work and thanks for doing what you do.
medicineman007 Hi Medicineman007, thanks for the support. That's a good question and I have no idea. My goal has always been to let students see and experience some of the concepts of science for themselves, after that I can only hope that the interest grows. This will be my 39th year of teaching and I still love it.
jjjjj
mmm kay
Great teacher! You can tell the students like and respect him. They are taking an interest in it too
I wish I had a teacher like you
take complete ownership of your results,& u won't have to wish for a teacher like that.
@@thewarlordscalling6537 Wow. Ok then.
he is my teacher
You are an awesome teacher. The world needs more educators like you. Congrats
+Gusecua thank you Gusecua, I love what I do.
My daughter is 15... 10th grade. I wish she had teachers like you. You really impact lives and give them hands on learning that they will remember forever. When you make learning fun, you make it memorable. Thank you for what you do.
I’m 21 years old, watching this video more amazed then half of your students, JAW ON THE FLOOR.
Awesome and engaging lesson for your students. You are the kind of teacher kids remember their entire lives. Great job seizing on the opportunity to explain the 7:1
I was searching for pulley system to roll an engine out of the bed of my truck and stumbled on this video. Practical science should be taught in every school.
I use this everyday in my job as a Lineman. This is a very well done basic demonstration without getting into all the math.
thanks Jesse
We need more teachers like this engaged with their work and students. Bruce, I admire that you are making a difference in their future.
Thank you Sean
I'm still having trouble believing the principal agreed to put the fate of his rear end in the students' hands. XD
They got "safety" brakes though
Chfjhjdhiiiif g k u c h j g inv chin j :/ Bhai j b hi hoof ;) cui f2fgj c hmm :-/ mc j j g junior g u ooiufvnjj
dafuq?
I wonder if safety breaks were in the initial tries...hopefully no injuries if there were.
Sir, you are an amazing Teacher. Practical experience, fun and physics. This should be a project for every student throughout the world. You could make it different, but you couldn't make it better. This is such an inspiration. This is the joy of teaching. Thank you so much :)
Physics is just normal life. Your practical explanation of pulleys makes this accessible to everyone, it's so easy to understand when you do the experiment and when your teacher explains the obvious.
Bruce Yeany, you are my hero of the week. My physics expertise was a product of hard work and my autodictactic skills. If only I had had a teacher like you. You are one in a million. I'm sure that many of your students will have had their lives changed (for the better) because of your love of sharing expertise in a practical, easy-to-understand way.
If I were Prime Minister of the UK, I would appoint you to lead and design UK Science teaching for the next generation(s).
Wonderful :)
P.S. The brake is just genius.
P.P.S. If it were possible to vote for the Best Video that you have viewed this year, your video would get my vote. Inspiring.
sbzerski, Thank you for the kind words and certainly appreciate hearing from you. I've spend a lifetime trying to find the best ways for making physics concepts easier to understand. I've had a lot of help along the way and I'm happy to share what I've learned
just showed this to my seven year old daughter, she was very inspired as was I - God Bless teachers like you!
Teachers like Professor Yeany have inspired untold numbers of others to pursue a better understanding of the physical world. Thank you sir :)
Such a great explanation of how the pulley system works! Great job Bruce! I wish all teachers were as creative as you. Greetings from South Africa
Superb explanation 😊
Awesome to see educators who truly love to teach. Wish our country would properly pay well-qualified/enthusiastic educators like Bruce.
I am Indian...
❤️❤️
I like this system to study..
Really it show the students practically...
Thank you sir .
To see the video , the students have clear concept of pully systems. 😊
Thanks for showing me this. My wife and I have had a tough time getting my wheelchair in our suv. I knew there was a diy pulley system I could use I just didn't know what. Thanks again. Tell students great job.
Just wanted to say thanks for this video! I've used it every year with my grade 5s for the last 4 years! It makes these concepts SO much easier to understand for them!
I'm happy to hear it helps
With a mechanical advantage of 2 you aren't pulling twice the distance to move the load half the distance, you're pulling twice the distance to get the load to move the same distance, or pulling the same distance to get the load to move half the distance.
Great teaching experience. How was the breaking system installed within the pulley?
it have a groove cut into the frame that catches the rope
Physics is the magic we are deserve to know, and you - are the magician.
You're awesome teacher! Thanks for showing your students something that they can relate to/apply in the real world instead of just teaching out of a book! A++
thank you
Hey Mr. Yeany it’s awesome to see how far your channel has come your sub count is double what it used to be when I was your student you were a great science teacher. It’s funny to see myself on this video brings back great memories, I hope you’re doing well take care of yourself
For those wondering I’m the small Hispanic boy in the orange shirt, proud to say mr. Yeany was my middle school science teacher 👍🏽
Sir. Thank you. I am building the best system for storing my jeeps hard top on the ceiling just using my own power and factoring in ease of use. I learned that for all I thought I knew, I knew nothing of value that could help me do that. I appreciate you walking through this and wish you continued success.
Thanks Freddy, glad it could help.
The Principal is quite a good sport for taking part. Great IRW demo.
Regards from spain! it is awesome how enjoy science, and how you show that to students!
Thank you, Wijos, it's great to hear from someone in Spain!
An inspired teacher. This is called active learning. If you want to teach someone such physical things, allow them to use their hands ... they will be able to solve problems faster and in a fun way. Laughter lets the learning juices flow.
I really applaud the effort in making a science and tech (or any subject matter really) concept fun
3:03 that principals a troll 😂
i always thought that physics was boring,until i had to search a way to lift heavy objects lol,nice video!
Great job teacher!! I wished I had a teacher like you!
MANNNNN WHERE WERE U ALL MY 12 YR OF SCHOOLING. MAN I GREW UP IN LOS ANGELES NEVER HAD TEACHER LIKE U, SEEMS LIKE WE NEVER HAD THIS MUCH FUN LEARING , THANKS FOR ALL U DO , LOVED TO HAD U AS MY TEACHER,
thank you, unfortunate that I was on the opposite coast
Thank you!
Do you have a video showing how to make the pulley system? I would love to try this with my children.
this is a purchased pulley set that I found on eBay. you can find smaller cheaper sets at hardware stores
Thanks for your video.. I actually learned a lot. I work in the hvac field and I was looking for this types of videos.
I’m hoping to do the same tomorrow with my kids 7th graders. This video inspired me to make it two years ago and it created a lot of memories 🤘🏻
Dr. Stone Anime Episode 6 made me come here :D
was doing some research...somehow i feel deja vu because i watch that too
Same.
yep ;D
Me too
Me too
Great video to learn from a practical experience. I would like to know more about the brake system though.
the rope goes through a tube which feeds it into the first pulley, this tube is like a lever and can pivot at the one end closest to the pulley. When you angle the rope and this tube upwards, that tube pinches it against the rope against the pulley wheel and keeps it from feeding into the pulley, to release it you pull don and the rope and the rope is free to move again
top notch! this is going to help me solve a problem with moving large fuel containers in my garage.
5:09 thats the point when it doesn't look like ''magic'' and it starts to make sense. great video Mr. Yeany
How you made last one please help me
I wish my kids' (and all kids) had YOU for a science teacher! Thanks for posting this so we can enjoy remotely!
Correct me if I'm wrong, but I believe the angle of the applied force gives the principle an advantage as opposed to the students pulling at more extreme angle.
Great videos. I wish all high school science teachers were as demonstrative as yourself.
Keep it up!
YOU ARE A FRICKIN LEGEND. LEGENDARY MAN
A man who really loves teaching and exploring Physics !
😀👍
Your way of teaching is the best keep it up👍🏻
Thank you for this video! I am writing a children's book where they use pulleys, and this really helped me understand how it should work!
what happens when you increase the pully ring size.. the bigger the ring (in diameters) more easier it is? just a thought. Nice demonstration.
This is exciting learning, these kids will always remember this!
Good - very good - engaging exercise that will never leave their minds, no matter how much or how little they understand it; they know there's something there! Which they can explore more later. I think the stress on the rope with the increased advantage is similarly lessened. You're still pulling on the railing just as hard and the pulleys may be taking some stress but the rope is dividing the load (according to how many strands are pulling up from the object being lifted) and doesn't need to be as strong / stressed.
What school is this? This is the education I’m looking for!
I taught in Pennsylvania
guy is a great teacher; most kids aren't so fortunate.
We need all teachers like this :)
Awesome,wish we had teacher like you. Learning from these experiments👍👍
Great video. Your students looked like they had a great time.
Hi. Thank you for this video and I was able to know what to do now. We are moving and we are at the 4th floor and the the stairs is imposible to use. What type of pulley is that? I need to buy that.
Great video , great teacher you are sir
Sir thanks for helping me to explain working of pulleys in such a easy way. May I ask for your help for balancing weight on lever. can you help me in making working model of lever.
if you go back and watch my video on mobiles, I gave a basic explanation of levers in it, that might help!
thanks Sir
What a great video and great teacher thanks bruce
As a crane operator this is the part of the crane that interests me the most
Good job but what about friction?
Fuck yea! THIS is science.
How to make students truly excited about science. Awesome teacher, awesome pedagogue!
This is the best Idea I can implement in my daily work thanks a lot sir..
Best teacher ever?
You teach soooooo nicely
Thank you for your explanation.
The best way to learn. So sad that in my country things aren’t like that
Very good information sir
Great video. Thanks
You are a good teacher, if my country got teacher like you...
If the moving pulley was instead fixed in place would it still be easier compared to one fixed pulley?
Hello sir.
Could you please explain if there is a "rule of thumb" as to how to know what the mech-advantage is in any system?
Is a fixed pulley only consideted as a change of direction?
In this case the mechanical advantage is equal to the number of ropes that are directly supporting the load. Whatever force is applied to the rope that you are pulling on is increased by that amount, minus the force lost to friction. IT also means that you while you are gaining force, you are losing distance by the same rate. So, four support ropes means you will increase your force by a factor of four, but you will need to pull four times further
Dankie/ Merci mister/ teacher. It helps a lot. The trolleys look so simple? I build a hoist with a pully (2x3) that can lift 450kg. When I shift the center of the hoist with 1m the lifting pulley can only lilt a max. of 50kg. So in this way I'll have to get a (2x5) pulley system. Thx.
Great teacher, congratulations!
Thank you. I'm 23 and I've been puzzling for days trying to figure out how these things work.
In india we are only taught to memorise from books
Thats why we hate studying
Well done sir.
I want 1 rope to have a similar setup to the last example...but I want 4 pulleys on each corner and to have a square with the ropes rather than a triangle as in most of these examples.
How to do this? How many pulleys?
I can calculate the weight etc I just don’t know how to set it up.
Thanks
I guess a good way to describe what I want to do is....imagine pulling a rope attached to an elevator...at least 4 pulleys on all corners would be required...the pyramid type would tend to swing more and easier....but a square wouldn’t as much.
Thanks for sharing, I had some trouble understanding the concept and glad to see someone, I'm able to understand and learn from. Also, I didn't know how to do the two pulley system, but now I do. :D
Hi Marshall, glad I could help
This teacher makes me wanna learn
What a school ! I'm jealous...
Can we use this technique in cycle for less input and more output?
We do. It is called the gear system. By selecting a lower gear setting, you trade speed for torque. This enables you to climb a steep hill by pedalling a lot of revolutions to reduce the force you need to apply to the pedal. It still is the same power, just re-formatted to trade torque and speed.
Bruce yenny can u tell me how to make a two rope bridge and go from on end to other using pulley or zip line like thing
Need to watch few times, does the rope loop back around the same pulley?
no, each strand has it's own
@@YeanyScience thank u
Hello Sir, I am a student of grade 9. I really enjoy your educational videos and makes me eager to learn more science. It is fascinating to see how interested in physics you are and helping your students to understand physics easily. Thanks a lot Sir, and keep making more such videos!
thank you
Hello from the future: I actually had to travel 5 times into the past to view this video :D. You could have really impressed the students by making it so easy that the handicapped boy could have participated, by either pulling it physically or towing it.
Where can I purchase these items to make something similar?
eBay, amazon craigslist, harbor freight, or other tool outlets. do a search for pulley sets or block and tackle. I purchased mine from eBay as a used set.
You have the best teachers ever😃
I took physics in high school. now in college. needed a little review on fixed pulley systems and work ratios and this was immensely helpful. Thank You!
Wow! thanks for making this video! Keep up the fantastic work!
could be very helpful to also demonstrate how the force could be reduced exponentially, rather than geometrically, by introducing additional pulleys.
You can't do that to the lifting force, but you can do that with the supporting force. Look up the capstan equation. The tension needed to hold a load stationary is an exponential function of how many turns you wrap the rope around a fixed cylinder called a capstan.
What's the name of the item use to stop the rope??? I know they're " The brakes ", but what's the actual name. Can I go to a store and ask if they have pulley brakes? I'm Googling pulley brakes and it seems to not know what I'm talking about it just shows random stuff that's why I ask.
it would be a kind of friction brake.
I loved your passion to share with the kids. Now lets change the circles diameter, so you have to pull less.
I saw a documentary once about the Eiffel tower initial elevator was using this principle.
Where can you get these pulleys and that metal pipe system
the pulleys are available through several science supplies companies, and amazon. I have not been able to locate where the pipe system came from
What if you use different size pulleys.
Your video clip is very helpful for me.Thank you very much.
Thank you very much sir, this was very helpful even for an undergrad studying math
Thanks sir ☺️ you are the best 😊
When I think about scientific principles like this I always correspond them to jobs. One pulley of force = the laborer carrying concrete bags for a paycheck. 16 pulleys of force = the engineer calculating the number of concrete bags needed for a much bigger paycheck. The first takes less time due to the 1:1 ratio but requires more physical force while the second requires 16x more time but requires 16x less physical force. Much respect to each of those professions though.