Throwing up and down

A person 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 is the one initially thrown

A) upward.

B) downward.

C) neither- they both hit at the same speed.

D) indeterminate.

Answer

Adapted from Eric Mazur, Peer Instruction, A User's Manual, Prentice-Hall, 1997