A ball is thrown upwards and returns to the same location. Compared with its initial speed its speed when it returns is about
A)half as much.
B)the same.
C)twice as much.
D)four times as much.

Question

Quizplus · Accepted Answer

The ball experiences a downward acceleration due to gravity. As it rises, its initial speed decreases until it reaches its maximum height where its vertical velocity is momentarily zero. Then it starts falling back due to gravity, gaining speed until it reaches its initial height. Since the ball experiences the same acceleration while going up and coming down, its final speed when it reaches the initial height is the same as its initial speed. Therefore, the answer is B, the same.

A Ball Is Thrown Upwards and Returns to the Same