An ore car of mass 4000 kg rolls downhill on tracks from a mine. At the end of the tracks, at 10 m elevation lower is a spring with k = 400,000 N/m. How much is the spring compressed in stopping the ore car?
1.40 m
0.14 m
0.56 m
1.96 m
2.34 m
We can use the conservation of energy concept here,
The initial potential of Ore car at height h will get stored into potential energy of spring via compression.
So we may write.
so we can determine the x
= 1.4m
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