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A solid, uniform ball rolls without slipping up a hill, as shown in Fig. 10.61. At the top of the hill, it is moving horizontally, and then it goes over the vertical cliff.
(a) How far from the foot of the cliff does the ball land, and how fast is it moving just before it lands?
(b) Notice that when the balls lands, it has a greater translational speed than when it was at the bottom of the bill. Does this mean that the ball somehow gained energy? Explain! |
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