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Question: Suppose the person in Example gave the ball an extra shove that sent it backwards at 2 m s-1 after the collision. Find the person's final momentum.

Example: A 24.6m s-1 bowling ball is a bit fearsome, so suppose that a person is on very slippery ice with a ball approaching at 4.0m s-1 as suggested by Fig. With what speed do the ball and person slide off together? Take the bowling ball's mass to be 5kg and the person's mass to be 70kg. You can calculate the final momentum of each and their common velocity, v, by using conservation of momentum to find the velocity v:

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