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 falls from the top of a building, v)g q+8rpe.x ethrough the an1b,24.ht2fhl )bqoo:ri oqn ir (air friction is present), to the ground below. How does the nr2. loqoq f:o1, ihn)2 hb4btkinetic energy (K) just before striking the ground compare to the potential energy (U) at the top of the building?
A. K is equal to U.
B. K is greater than U.
C. K is less than U.
D. It is impossible to tell.
参考答案: C
本题详细解析:
暂无
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