Simple Machines

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Storyboard Description

Lever and Pulleys

Storyboard Text

  • Today's lesson is on the lever and pulley.
  • What are those?
  • Well, the lever is a simple machine that lift objects. You push down on one end, and the other lifts the object across the fulcrum. We use this on a sea-saw.
  • Can one of you tell me what this is and what it does?
  • That is the pulley. It's a wheel with a rope around it. It works by pulling the rope down, which results and pulling the load up. You use this machine with the window shades. You pull on the rope, and the shades rol up.
  • And this simple machine?
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