- (II) Two masses, m. nected by a rope that hangs over a pulley (as in Fig. 8–54). The pulley is a uniform cylinder of radius R = 0.311 m and mass 3.1 kg. Initially ma is on the ground and mg rests 2.5 m above the ground. If the system is released, use conservation of energy to determine the speed of mg just before it strikes the ground. Assume the pulley bearing 32.0 kg and mg = 38.0 kg, are con- R is frictionless. mB 2.5 m FIGURE 8-54 Problem 58.

- (II) Two masses, m. nected by a rope that hangs over a pulley (as in Fig. 8–54). The pulley is a uniform cylinder of radius R = 0.311 m and mass 3.1 kg. Initially ma is on the ground and mg rests 2.5 m above the ground. If the system is released, use conservation of energy to determine the speed of mg just before it strikes the ground. Assume the pulley bearing 32.0 kg and mg = 38.0 kg, are con- R is frictionless. mB 2.5 m FIGURE 8-54 Problem 58.