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

Two identical 0.9-lb slender rods AB and BC, are welded together to form an L-shaped assembly. The assembly is guided by two small wheels that roll freely in inclined parallel slots cut in a vertical plate. Knowing that θ = 30°, determine (a) the acceleration of the assembly, (b) the reactions at A and C.