A dumbbell consisting of two balls of mass m connected by
Chapter , Problem 117(choose chapter or problem)
A dumbbell consisting of two balls of mass m connected by a massless 1.00-m-long rod rests on a frictionless floor against a frictionless wall with one ball directly above the other. The centerto- center distance between the balls is equal to 1.00 m. The dumbbell then begins to slide down the wall, as in Figure 8-58. Find the speed of the bottom ball at the moment when it equals the speed of the top ball.
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