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PICKING UP HEAVY METAL

Pick up heavy weights easily with a simple pulley system

Suitable For

Grade 6

Difficulty

2

Time Required

 <12 Hours

Supervision

Advised

What’s it about?

You might find it difficult lifting heavy weights in the normal way, but with the help of a simple pulley system designed to magnify effort, you may be stronger than you realize! A ‘pulley’ is a simple ‘machine’ that is used to change the amount or direction of a pulling force to make work easier.

A simple ‘pulley’ consists of only a rope that is looped around a support (usually a wheel). More complex pulley systems exists, but let’s first get more familiar with the science behind pulleys with the following science experiment:

Topics covered

Pulley system, Gravity, Block and tackle

What will I need?

  • 2x CHAIRS
  • BROOM STICK
  • SPOOL
  • SMALL BUCKET
  • ROPE (THIN & STRONG)
  • WIRE COAT HANGER

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 broomstick, rope and spool has been put together to form of a common device called a pulley system, a simple device that magnifies perceived effort or pull forces. Pulleys make it easier to lift heavy loads by changing the amount or direction of a pulling force. In this experiment, the pulley system changes the direction of force, which allows you to use ‘gravity’ to help you lift the bucket. ‘Gravity’ is the force that pulls objects toward the earth and helps you by pulling on your body as you pull on the rope.

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