# Answer to Question #40907 in Mechanics | Relativity for alzahra

Question #40907

A ball is thrown upward at time t = 0.0 s, from a point on a roof 60 m above the ground. The

ball rises, then falls and strikes the ground. The initial velocity of the ball is 28.4 m/s. Consider

all quantities as positive in the upward direction. At time t = 4.3 s, the acceleration of the ball is

closest to

ball rises, then falls and strikes the ground. The initial velocity of the ball is 28.4 m/s. Consider

all quantities as positive in the upward direction. At time t = 4.3 s, the acceleration of the ball is

closest to

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