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A person carries a plank of wood 2.00 m long with one hand pushing down on it at one end with a force F, and the other hand h
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Answer #1

Taking Moment about the end where F2 acts  : F_1 * 1 + mg*1 = 0

\Rightarrow \left | F_1 \right | = mg = 20 * 9.8 = 196 N

Taking Moment about the end where F1 acts  : F_2*0.5 + mg*1 = 0

\Rightarrow \left | F_2 \right | = \frac{mg}{0.5} = \frac{20 * 9.8 }{0.5}= 392 N

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