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 boz k7:u26mwsc *1esu fnu)zt hkjg4s*gy9 y8ngw f0rbksse;2z3a8p) q 7nces back with half of its original speed. What is the ratio of the final kinetic energy to the initial kinetic ep 8g 9 )brkt* ;8s0fzsk3yhga2q7)4ew zg nsjynergy?

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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