The 150-lb man lies against the cushion for which the coefficient of static friction is...

The 150-lb man lies against the cushion for which the coefficient of static friction is Determine the resultant normal and frictional forces the cushion exerts on him if, due to rotation about the z axis, he has a constant speed v = 20 ft/s. Neglect the size of the man. Take θ = 60°.