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Prove you are stronger than your friends with a simple pulley system

Suitable For

Grade 4



Time Required

 <12 Hours



What’s it about?

Do you think you are stronger than two of your friends? No? You may be stronger than you realize! With a little help from a simple pulley system designed to magnify effort, or pull, you may just be able to prove that you are stronger than two of your friends put together.

Topics covered

Pulley system, Block and tackle

What will I need?

  • ROPE
  • 2x FRIENDS

Procedure (Method)

Unfortunately, this section is only available in the e-book version of the project.

How does it work?

Unfortunately, this section is only available in the e-book version of the project.

This science experiment works because the broom handles and rope has been put together to form of a common device called a pulley system, a simple device that magnifies perceived effort or pull forces. A pulley will help you lift a heavy load with little effort, in this case overcoming the heavy load (the big pull force of your two friends) with little effort (The little pull on the end of the rope).

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