Someone standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball to hit the ground below the cliff with the
Greater speed will be
A) the one thrown downward.
B) the one thrown upward.
C) neither - they will both hit with the same speed.

Question

Quizplus · Accepted Answer

Neglecting air resistance, both balls will hit the ground with the same speed due to the conservation of energy. The ball thrown upwards will lose speed until it stops and then accelerates downwards, while the ball thrown downwards will just keep accelerating from the start. Both will gain the same amount of speed from the point of release to the point of impact.

Someone Standing at the Edge of a Cliff Throws One