February 25, 2017

Homework Help: physics

Posted by Sam on Thursday, December 30, 2010 at 6:26pm.

A railroad car of mass 2500 kg moving at 5.00 m/s collides and couples with two coupled railroad cars, each of the same mass as the single car and moving in the same direction at 2.20 m/s. (a) What is the speed of the three coupled cars after the collision?

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