Work Energy and Power (id: 1d8af0e81)

本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)

[单选题]
02.48: An object of mass M is drhf ( b4ja3 z-zloro4gpos+c42oppy)gi, ns c-pq0ed from aheightH above the ground. The object crashes into some soft earth and comes to rest by compressing the earth a distance of H/2. Assuming that air resistance is negligible, what is the magnitude of the average constant force exerted by the ground on t0cni-,gsy ) qphe object while coming to rest?

A. $0$
B. $2/3Mg$
C. $Mg$
D. $2Mg$
E. $3Mg$


参考答案:  E


本题详细解析: 暂无

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