Two Balls of Equal Mass Are Thrown Against a Massive

Multiple Choice

Two balls of equal mass are thrown against a massive wall with equal velocities.The first rebounds with a speed equal to its striking speed,and the second sticks to the wall.The impulse that the first ball transmits to the wall,relative to the second,is

A) twice as great.
B) half as great.
C) the same.
D) four times as great.
E) one-fourth as great.