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]
A ball drops some distancev z) vak(;xp5u0cr v9u and loses 30 J of gravitation* aq ,v1 fog)ng,+gjji)rnjf-q)ui. 1 vbgq4mal potential energy. Do not ignore air resistance. How much kinetic energy did the ball gaiajr1gv *q)fjgjqm-q ) 1v4+) nioiug fn g.,,bn?
A. more than 30 J
B. exactly 30 J
C. less than 30 J
D. cannot be determined from the information given
参考答案: C
本题详细解析:
暂无
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