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 greatest speed will be the one initially thrown
A)upward.
B)downward.
C)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 upward will lose speed until it stops and then accelerates downward, while the ball thrown downward will simply continue to accelerate. 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