The linkage consists of the two slender bars and moves in the horizontal plane under the...

The linkage consists of the two slender bars and moves in the horizontal plane under the influence of force P. Link OC has a mass m and link AC has a mass 2m. The sliding block at B has negligible mass. Without dismembering the system, determine the initial angular acceleration α of the links as P is applied at A with the links initially at rest. (Suggestion: Replace P by its equivalent force-couple system.)