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) +12 m/s.
C) -12 m/s.
D) -175 m/s.
E) +175 m/s.

Question

Quizplus · Accepted Answer

At the highest point of the trajectory, the vertical velocity of the ball is 0 m/s.

A Ball Is Projected Upward at Time T = 0