Question

A bead of mass 100g lying in a rough honzontal straight groove Coefficient of friction 3/4 and equation r(t) = (1+t) i+2t)j (distances measured in metres) is slowly drawn along the groove from the point r(0) to the point r(3) by a force which act parallel to 3i+j - find the magnitude of the force and the work done.​

Answer 1

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