Question

A 12.0-kg horizontal plank 4.00 m long rests on two supports, one at the left end...

A 12.0-kg horizontal plank 4.00 m long rests on two supports, one at the left end and a second 1.00 m from the right end. What is the magnitude of the force exerted on the plank by the support near the right end?
____ N

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