R.15-5. The system shown in Figure RP15-5 is accelerated from rest by force P. Assume no slipping of the cable on the roller. Determine the velocity of block Aat t 0.155 second. Confirm this velocity value by using the impulse-momentum method, the work-energy method, and the inertia method. (Block A moves 0.3 m in 0.155 second.) Ip = 1.2 kg . m 2 B P = 750 N 15 kg A 10 kg 25 m FIGURE RP15-5 LL = .2