What is the speed of two railroad cars after they collide?


Posted January 31st, 2009 by admin 2 Comments »
cars
finding.4ever asked:


A railroad car of ams m is moving at speed v when it collides with a second railroad car of mas M which is at rest. The two cars lock together instantaneously and move along the track.

What is the speeed of the cars immediatly after the collision?

How would you find it?

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