Multiple Choice
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 with insignificant air resistance,missing the roof,and strikes the ground.The initial velocity of the ball is 58.5 m/s. Consider all quantities as positive in the upward direction.At time t= 5.97 s, 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.
Correct Answer:

Verified
Correct Answer:
Verified
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