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Aball is projected upward at time t = 0.0 s, from a point on a roof 20 m above the ground. the ball rises, then falls and strikes the ground. the initial velocity of the ball is 37.9 m/s. consider all quantities as positive in the upward direction. at time t = 6.2 s, the acceleration of the ball is closest to:
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Aball is projected upward at time t = 0.0 s, from a point on a roof 20 m above the ground. the ball...
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