Two identical 0.9-lb slender rods AB and BC are welded together to form an L-shaped assemb...

Two identical 0.9-lb slender rods AB and BC are welded together to form an L-shaped assemblv. The assemblv is guided by two small wheels that roll freelv in inclined parallel slots cut in a vertical plate. Determine (a) the angle of inclination θ for which the reaction at A is zero, (b) the corresponding acceleration of the assembly.

Fig. 16.4