The uniform slender bar of mass m is freely pivoted at point O of the frame of mass M. D...

The uniform slender bar of mass m is freely pivoted at point O of the frame of mass M. Determine the force P required to maintain the bar perpendicular to the incline of angle θ as the system accelerates in translation down the incline. The coefficient of kinetic friction between the frame and the incline is μ_k.