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 oy:iplu7637hc psxd 2gc 1 uoj9f mass 2.0 kd/veee 3u y0w-g falling straight downward hits the ground with a speed of 0.90 m/s and then rebyewe -u/0dv3eounds straight upward with a speed of 0.60 m/s. The collision time 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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