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cover of episode How do ping-pong balls bounce so high?

How do ping-pong balls bounce so high?

2025/1/13
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Moment of Um

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Dr. Kylie Kennedy
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Dr. Kylie Kennedy:乒乓球之所以弹跳很高,是因为能量守恒定律。当乒乓球下落并接触地面时,它的动能转化为使球体压缩的能量。由于乒乓球是由具有弹性的塑料制成,它就像一个弹簧一样,能够储存并释放能量。当球体被压缩后,储存的能量会以动能的形式释放出来,使乒乓球再次弹起。这个过程中,重力势能转化为动能,动能转化为弹性势能,最终又转化回动能,从而实现高弹跳。 此外,乒乓球的材质和结构也对其弹跳高度有影响。轻质且具有良好弹性的球体能够更好地储存和释放能量,从而实现更高的弹跳。

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Ping pong is a super fun game. It’s like miniature tennis, where people use paddles to make balls fly across a table., and sometimes way, way up in the air!  But how do those  tiny plastic balls manage to bounce so high? We asked physicist Dr. Kiley Kennedy to help us find the answer.  Got a question that’s *bouncing around *your brain? Ping us at BrainsOn.org/contact), and we’ll *serve *up the answer!