本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学
[单选题]
A ball with mass $m$ is released from a height of $h$ and undergoes free fall. The ball hits the ground and rebounds vertically. On rebound, the ball reaches a maximum height of $h'$ . The time taken for the collision is $T$ . What are the magnitude of the change in kinetic energy of the ball and average net force on the ball?
A. $mg(h-h')\;\;\;\;\frac{m(\sqrt{2gh}+\sqrt{2gh})}{T}$
B. $mg(h'-h)\;\;\;\;\frac{m(\sqrt{2gh}-\sqrt{2gh})}{T}$
C. $mg(h'-h)\;\;\;\;\frac{m(\sqrt{2gh}+\sqrt{2gh})}{T}$
D. $mg(h-h')\;\;\;\;\frac{m(\sqrt{2gh}-\sqrt{2gh})}{T}$
参考答案: A
本题详细解析:
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