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30 April, 03:27

Winston stands on the edge of a building's flat roof, 12 m above the ground, and throws a 147.0-g baseball straight down. the ball hits the ground at a speed of 18 m/s. what was the initial speed of the ball?

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  1. 30 April, 05:14
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    Assume theres no air reaistance. (or else the ball will oppose the motion of the ball, hence decrease the velocity increase)

    see if there are any problems!
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