本题目来源于试卷: Impulse and momentum，类别为 美国物理杯赛(Physics Bowl)
[单选题]
01.08: A 50 kilogramgl4.(4e*yap sz)c l jy 8tst imzi3:n+t7gz 3sgymnast falls freely from a height of 4 meters on to a trampoline. The trampoline then bounces her back upward with a speed equal to the speed at which she first struck the trampoline. What is the ati:+g 3tnsz3 7zismt8verage force the trampoline applies on the gymnast?
A. 50 newtons
B. 200 newtons
C. 500 newtons
D. 2000 newtons
E. More information is required
参考答案: E
本题详细解析:
暂无
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