一个机械工用叉形扳手松开在C点的螺栓,该名机修工在A点和B点握著扳手手柄并在这两点用力扭动.知道以上的力等效于一个力C和一个力偶矩Mc,当力A在z轴的分量为10N的时候,计算施加在点A和点B的力的大小
英语翻译A mechanic uses a crowfoot wrench to loosen a bolt at C.
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