Which box ends up moving faster

[05holtel]

Homework Statement

Two balls of equal mass are thrown horizontally with the same initial velocity. They hit identical stationary boxes resting on a frictionless horizontal surface. The ball hitting box 1 bounces back,while the ball hitting box 2 gets stuck. Which box ends up moving faster

The Attempt at a Solution

I would think that box 2 ends up moving faster. Is this correct
Thanks

 

[hage567]

Why do you think that? I would think you would need to show it mathematically. Have you done that?