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4. Twila throws a ball directly downward from a window that is 25.0 m above the ground. It takes the ball 1.97 s to

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4. Twila throws a ball directly downward from a window that is 25.0 m above the ground. It takes the ball 1.97 s to impact with the ground. a) Calculate the initial velocity that the ball was thrown at. b) Calculate the impact velocity. c) If the ball was dropped from rest how long would it have taken to impact the ground?

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