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]
10.33: A rubber ball of mass 2.0 kg falling stra givwsr dr qk5pi+70u30e/jj1 ight downwardke1d ozgj6r rovcdk097*y)+ v hits the ground with a speed of 0.90 m/s and then rebounds straight upward with a speed of 0.60 m/s. The collision t)ro go79vyk 1evj6z0r+kddc*ime of the ball with the ground is 0.25 s. Treat g = 10 N/kg.
What is the magnitude of the average force (in units of Newtons) exerted by the ground on the ball while they are in contact?
A. 2.4
B. 12.0
C. 20.0
D. 26.0
E. 32.0
参考答案: E
本题详细解析:
暂无
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