Step Launcher (Challenge Video)

What do a bat hitting a baseball, a nutcracker opening a walnut, and a trebuchet flinging a boulder have in common? They all make excellent use of levers, simple machines that can convert a small force into a large one, or a small motion into a large one. Engineers use different kinds of levers to accomplish a wide range of tasks.

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Engineer holds a ping pong ball for Step Launcher engineering activity

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