Tuesday
March 31, 2015

Homework Help: physics

Posted by mia on Wednesday, November 28, 2012 at 6:22pm.

An ore car of mass 37000 kg starts from rest
and rolls downhill on tracks from a mine. At
the end of the tracks, 28 m lower vertically, is
a horizontally situated spring with constant
2.8 10
5
N/m.
The acceleration of gravity is 9.8 m/s
2
.
Ignore friction.
How much is the spring compressed in stopping the ore car?

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