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# What is a Pulley?

Physics | 7-13 yrs | Animation, Video

Learn about pulleys with this interactive video lesson on pulleys, for kids.

## How to make a Pulley?

Learn how simple physics helps make everyday life easier. Make your own pulley system at home. You will need some wire, thread, a spool, a hook and a bucket filled with toys or other materials. After assembling the pulley, first try and lift the bucket with your hands, and then again try lifting it with the pulley. Which one is easier?

Sometimes, it’s not easy to lift heavy objects with only human force. This problem can be fixed with the help of a simple machine like a pulley.

## What is a Pulley made of?

A basic pulley comprises of a wheel on a fixed axle, with a groove along the edges to guide a rope or cable.
Here,
Load = the weight of an object
Effort = the amount of force required to lift or move this object.

When you put two or more wheels together, and run a rope around them, you have created a great lifting machine.

The trade-off is that as you increase the number of pulleys, you require a greater amount of rope to achieve the same result. Since you have decreased the effort needed to lift the load, you have to apply the force for a longer period of time.

For instance, it takes more effort to lift the load in a one pulley system. In a three pulley system it takes less effort, and it takes still lesser effort to lift the load in a five pulley system.

### Activity

Where do you notice a pulley around you? Hint- you use one in a building.

Looking for more physics articles and videos? Go to: Physics for Kids.

2. Anonymous (not really)

thanks now i can finish my assignment

3. its really helpful because in science children will be able to put an effort to there work.

4. it a good

5. diana

cool it helps

6. thank you verry much mocomi.com

7. thank you ………. Mocomi for helping me do my assignment

8. livy

Thank you so much! This helped a bunch for my project!!!

9. krokeka@yahoo.com

nice videos!!!!

10. I am not sure where you are getting your info, but good topic.
I needs to spend some time learning much more or understanding more.
Thanks for excellent information I was looking for this info for my mission.

You’re welcome, Chrissy! Good luck

12. Thank you so much! Wish me good luck on my TCAP’S!!!

13. a the bae

awesome!

Thanks, Brittany.

15. This is really helpful because I have a project and it’s of pulleys. thank you sooooooo much:)

Thanks Ariana!

Thanks Afra!

18. very very very cool loved it so awesome

19. cool

20. NICE

21. gooooooooooooooood

22. good

23. soo cool

24. cool

25. this is cool

26. i really liked it . i got to know many things .let mocomag give more and mare information on different topics.i do want mocomag to give more things on this .one suggestion is that to give more easy information. but still it was really nice . try to improve about the information given . bye!!!