A Student with a Mass of 40 Kg Can Throw

Multiple Choice

A student with a mass of 40 kg can throw a 15-kg ball with a relative speed of 5.0 m/s.The student is standing at rest on a cart with a mass of 12 kg that can move over the ground without friction.If the student throws the ball horizontally,what is the student's speed relative to the ground?

A) 1.4 m/s
B) 5.0 m/s
C) 3.9 m/s
D) 1.9 m/s
E) 1.1 m/s