A ball is projected upward at time t = 0 s, from a point on a flat roof 10 m above the ground. The ball rises and then falls, missing the roof, and strikes the ground
The initial velocity of the ball is Consider all quantities as positive in the upward direction. Neglect the effects of air. At time the vertical velocity of the ball is closest to A) 0 m/s.
B) +175 m/s.
C) +12 m/s.
D) -175 m/s.
E) -12 m/s.
A
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