A ball is thrown straight up,reaches a maximum height,then falls to its initial height.Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?
A)Both its velocity and its acceleration point upward.
B)Its velocity points upward and its acceleration points downward.
C)Its velocity points downward and its acceleration points upward.
D)Both its velocity and its acceleration points downward.

Question

Quizplus · Accepted Answer

When the ball is going up, its velocity is initially positive (upward) and decreases until it reaches zero velocity at the maximum height. At the same time, the acceleration of the ball is directed downward due to the force of gravity. Therefore, the correct statement is that the velocity of the ball points upward while its acceleration points downward.

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