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53.1 A ball is thrown horizontally with the speed of 15 nus from the top of a building. It takes the hall 5 s to

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53.1 A ball is thrown horizontally with the speed of 15 nus from the top of a building. It takes the hall 5 s to land on the ground. (a) 1What is the speed of the ball when it hits the ground? (lb) What is the magnitude of the displacement? [Answer: (a) 52.2 mfs, (b) 145.8 In]

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