Determine the force P required to give the open-link chain of total length L a constant...

Determine the force P required to give the open-link chain of total length L a constant velocity The chain has a mass ρ per unit length. Also, by applying the impulse-momentum equation to the left-hand portion of the system, verify that the force R supporting the pile of chain equals the weight of the pile. Neglect the small size and mass of the pulley and any friction in the pulley.