A ball is thrown straight up,reaches a maximum height,then falls to its initial height.As the ball is going up
A) both its velocity and its acceleration point downward.
B) its velocity points downward and its acceleration points upward.
C) its velocity points upward and its acceleration points downward.
D) both its velocity and its acceleration point upward.

Question

Quizplus · Accepted Answer

When the ball is thrown straight up, its initial velocity is upward. As it moves upward, its velocity decreases and eventually reaches zero at the maximum height. Therefore, during this motion, the velocity of the ball points upward. At the same time, the acceleration of the ball is due to gravity, which is always pointing downward. Therefore, the acceleration of the ball points downward. Hence, option C is correct.

A Ball Is Thrown Straight Up,reaches a Maximum Height,then Falls