A ball is projected upward at time t = 0.0 s, from a point on a roof 90 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 61.2 m/s. Consider all quantities as positive in the upward direction. At time tt = 1.6 s, the acceleration of the ball is closest to: A.-10 m/s B. -5 m/s C. +10 m/s D. zero E. +5 m/s^2

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A ball is projected upward at time t = 0.0 s, from a point on a roof 90 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is 61.2 m/s. Consider all quantities as positive in the upward direction. At time tt = 1.6 s, the acceleration of the ball is closest to:

A.-10 m/s
B. -5 m/s
C. +10 m/s
D. zero
E. +5 m/s^2
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