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Wheels and Levers.(Brief Article)
Imagine a world without wheels. How would you ride a bike? pull a wagon? roller-skate?
Wheels help us pull, spin, and grind things. Try the experiment with a partner to see how wheels work.
Wheels help things move more easily. Levers help lift, cut and pry things open.
RELATED ARTICLE: How Do Wheels Turn?
What to observe
How can wheels help move things from place to place?
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Source: HighBeam Research, Wheels and Levers.(Brief Article)