Which of the following represents the vertical velocity of the rocket when it reaches its maximum height? A. 0.0 m/s B. -9.91 m/s C. +30 m/s D. -30 m/s

Answer 1

At the very moment the rocket has reached its maximum height, the rocket has zero velocity. When the rocket's fuel runs out, the rocket will continue to coast upward until the acceleration of gravity slows it, eventually becoming zero at the maximum height.