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A steel ball and a piece of clay have equal masses. They are dropped from the same height on a horizontal steel platform. The ball bounces back with nearly the same speed with which it hit. The clay sticks to the platform. Which is true about the ball/platform and the clay/platform systems?A. The ball has a greater momentum change.B. The clay has a greater momentum change.C. The momentum of each system changes.D. The momentum of each system stays the same.

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