Two masses, mAmA = 30.0 kgkg and mBmB = 39.0 kgkg are connected by a rope that hangs over a pulley (as in the figure(Figure 1)). The pulley is a uniform cylinder of radius RR = 0.315 mm and mass 4.0 kgkg . Initially, mAmA is on the ground and mBmB rests 2.5 mmabove the ground. If the system is now released, use conservation of energy to determine the speed of mBmB just before it strikes the ground. Assume the pulley is frictionless. Express your answer using three significant figures and include the appropriate units.

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Two masses, mAmA = 30.0 kgkg and mBmB = 39.0 kgkg are connected by a rope that hangs over a pulley (as in the figure(Figure 1)). The pulley is a uniform cylinder of radius RR = 0.315 mm and mass 4.0 kgkg . Initially, mAmA is on the ground and mBmB rests 2.5 mmabove the ground.

If the system is now released, use conservation of energy to determine the speed of mBmB just before it strikes the ground. Assume the pulley is frictionless.

Express your answer using three significant figures and include the appropriate units.
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