Homework Help: Physics

Posted by Zach on Monday, November 30, 2009 at 2:14pm.

A 120 g ball moving to the right at 4.2 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic, what are the speed and direction of each ball after the collision?

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