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Friction

A block of ma...

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A block of mass m is kept on a plank. Thecoefficient of friction between the plank and theblock is 1. The plank is slowly raised from one endso that it makes angle 0 with horizontal. The forceof friction acting on the plank when 0 30^° isFrAmy77777ban 30%Mg(1) J2Mg(2)23Mg(3)E2(4) Ma

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