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]
96.38: A pendulum bob mass mon a cord length L is pulled -:: j8o9fn4yygztffz sideway ..ppxgn(.mqp 0 j df1es until the cord makes a ..mnjgpp p( fxd0e .q1n angle
θ with the vertical as shown in the figure to the right. The change in potential energy of the bob during the displacement is:
A. $ mgL (1 – cosθ) $
B. $mgL (1 – sinθ) $
C. $mgLsinθ$
D. $mgLcosθ$
E. $ 2mgL (1 – sinθ)$
参考答案: A
本题详细解析:
暂无
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