本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 通用国际物理
[问答题]
When a “superball” is dropped, can it rebound to a hy(x)z i, h ztq,1.hqaneight greater th-ff/vhyd d4 x;0oq3ey an its original o ;d/-e fdhq 4yfy0v3xheight? Explain.
参考答案: The superball
cannot rebound to a height greater than its original height when dropped. If it did, it would violate conservation of
energy. When a ball collides with the
floor, the KE of the ball is converted into elastic PE by deforming the ball,
much like compressing a spring. Then as
the ball springs back to its original shape, that elastic PE is converted to
back to KE. But that process is “lossy”
– not all of the elastic PE gets converted back to KE. Some of the PE is lost, primarily to
friction. The superball rebounds higher
than many other balls because it is less “lossy” in its rebound than many other
materials.
本题详细解析:
暂无
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