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October 20, 2014

October 20, 2014

Posted by **Brendan** on Monday, January 25, 2010 at 1:47am.

A 12,000 kg railroad car traveling at a speed of 19 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward?

What would my x axis be and what would my y axis be ?

- physics -
**drwls**, Monday, January 25, 2010 at 2:02amThey are not asking you to graph the collision. All you need to do is apply a momentum conservation formula to compute a final speed.

The final speed is half the initial speed of the moving car.

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