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提问人:网友embory 发布时间:2022-01-07
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A rod of length L is pivoted about its left end and has a force F applied perpendicular to

the other end. The force F is now removed and another force F’ is applied at the midpoint of the rod. If F’ is at an angle of 30° with respect to the rod, what is its magnitude if the resulting torque is the same as when F was applied?

A、F

B、2F

C、3F

D、4F

E、5F

F、6F

G、7F

简答题官方参考答案 (由简答题聘请的专业题库老师提供的解答)
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