Joe and Bill throw identical balls vertically upward.Joe throws his ball with an initial speed of twice as high as Bill's ball.The maximum height of Joe's ball will be
A)four times that of Bill's ball.
B)two times that of Bill's ball.
C)equal to that of Bill's ball.
D)eight times that of Bill's ball.
E)roughly 1.3 times that of Bill's ball.

Question

Quizplus · Accepted Answer

The maximum height reached by an object thrown vertically is proportional to the square of its initial speed. If Joe's initial speed is twice that of Bill's, the maximum height will be four times greater (2^2 = 4).

Joe and Bill Throw Identical Balls Vertically Upward