For This Question, Assume That All Velocities Are Horizontal and That

Multiple Choice

For this question, assume that all velocities are horizontal and that there is no friction. Two skaters A and B are on an ice surface. A and B have the same mass M = 90.5 kg. Skater A is initially motionless, and then throws a ball with mass m = 200 g toward B with a speed v = 21.5 m/s relative to the ice. B catches the ball and throws it back to A with the same speed. After A catches the ball, his speed with respect to the ice is

A) 4.3  10³ m/s.
B) 4.3 m/s.
C) 4.8  10^-2 m/s.
D) 9.5  10^-2 m/s.
E) 0.34 m/s.