Question: In order to decrease the undesirable moment about the x - axis, a mechanic uses his left hand to support the wrench handle at point

In order to decrease the undesirable moment about the x-axis, a mechanic uses his left hand to support the wrench handle at point B. What upward force F must he exert in order that there be no moment about the x -axis? What then is the net moment about O ?
In order to decrease the undesirable moment about

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