Question

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

Answer #1

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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