Physics Unit6: Work and Energy (id: e2fa8f5b4)

本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理

[单选题]
An object hits a wall and bounces back with h cr s5 h wx/j0kv j7g6ivvr/nc6ot7,;half of itsi :,)x eu;msvj original speed. What is the ratio of the finaixu;s j:,em)vl kinetic energy to the initial kinetic energy?

A. \frac{1}{2} \;
B. 1/4
C. 2
D. 4


参考答案:  B


本题详细解析: 暂无

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