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April 21, 2014

Homework Help: physics

Posted by Jane on Tuesday, November 29, 2011 at 10:00pm.

Running at 2.0 m/s a 45.0 kg person collides with a 90.0 kg person who is traveling at 7.0 m/s in the other direction. Upon collision, the 90 kg person continues to travel forward at 1.0 m/s. How fast is the 45 kg person knocked backwards?

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