本题目来源于试卷: Rotational Equilibrium，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.33: A uniform rectangular s v-+fdvi0fg2ra l12u n+t 8goz qip rj-jffbcut8av1 ,28r*9colid of side length Land width w sits on a frictionless incline of variable angle θ . Assume that there is a very tiny peg preventing the box from sliding down the incline at the point labeled P. At what angle of incline will the box begi r pjta uiv-1q,2 cr8 9bc8ff*jn to tip over?
A. $θ = sin^{-1}\frac{W}{L}$
B. $θ = cos^{-1}\frac{W}{L}$
C. $θ = tan^{-1}\frac{W}{L}$
D. $θ = cot^{-1}\frac{W}{L}$
E. Values for w and L must be known.
参考答案: D
本题详细解析:
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