The frame is made from uniform rod which has a mass per unit length. A smooth recessed slot constrains the small rollers at A

The frame is made from uniform rod which has a mass ρ per unit length. A smooth recessed slot constrains the small rollers at A and B to travel horizontally. Force P is applied to the frame through a cable attached to an adjustable collar C. Determine the magnitudes and directions of the normal forces which act on the rollers if 

(a) h = 0.3L, 

(b) h = 0.5L, 

(c) h = 0.9L. 

Evaluate your results for ρ = 2 kg/m, L = 500 mm, and P = 60 N. What is the acceleration of the frame in each case?

L .C P L h A