A horizontal plank 400 m long and having mass 200 kg rests
A horizontal plank 4.00 m long and having mass 20.0 kg rests on two pivots, one at the left end and a second 1.00 m from the right end. Find the magnitude of the force exerted on the plank by the second pivot.
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a horizontal plank 400 m long and having mass 200 kg rests on two pivots one at the left end and a second 100 m from
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