Answer Happy

Problem 2: (12 pts) Consider the system shown in the figure below with mi= 20.0 kg and m2= 12.5 kg suspended and joined by a cord that passes over a pulley with radius R = 0.200 m and mass M = 3.00 kg (treat the pulley as a uniform disk with moment of inertia I = MR2). The cord has negligible mass and does not slip on the pulley. The pulley rotates on its axis without friction. m2 is resting on the floor, and mı is 3.00 m above the floor when it is released from rest. (a) If mi is allowed to fall, use conservation of energy to find the velocity of the masses just before m, hits the floor. (8 pts) (b) Use the kinematics equations to calculate the time interval required for mi to hit the floor. (4 pts) 3 3.00 m 12