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March 27, 2015

Homework Help: physics

Posted by Stacy on Thursday, December 8, 2011 at 7:28pm.

An ore car of mass 42000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 6.8 m lower vertically, is a horizontally situated spring with constant 3.8 x 10^5 N/m. The acceleration of gravity is 9.8 m/s^2.
How much is the spring compressed in stoping the ore car?

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