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CLIP 6660

How do levers work?

How do levers work?
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Key Info
  • How do levers work?
  • Duration: 02:33
  • Children investigate how levers work using tug of war equipment. When the girls are unevenly matched with the boys, they discover that moving the rope gives them more pulling power with less effort. A giant syringe has a dropping ball, which forces air through its tube to move a tennis ball upwards. Children experiment with compressed air, discovering how much force it will take to lift heavy weights. Pumping up a balloon forces more air into the same space, demonstrating how, when air is compressed, its pressure increases. When a force created by air pressure is very strong, it is called a 'pneumatic force'. Forces drive everything, so we need to have an understanding of how they work.
  • Subject:

    Science

       Topic:

    Forces: Pushes and Pulls

  • Keywords: lever, compressed, compressing, force, air, pressure, pneumatic, pneumatic force, inflated, balloon, experiment
Ideas for use in class
  • A useful way to demonstrate levers without the need for equipment. Pupils might want to replicate the children's investigations with balloons and weights, or devise their own experiments to test some of the themes this sequence introduces.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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