The 2-kg uniform rod AB is in the shape of a quarter circle and its ends are attached to c...

The 2-kg uniform rod AB is in the shape of a quarter circle and its ends are attached to collars of negligible weight that slide along fixed rods. Rod AB is released from rest in the position shown. Assuming no friction at A and a friction force of magnitude 0.9 N at B, determine die angular acceleration of the rod immediately after release.

Fig. P16.114