An ore car of mass 4000 kg starts from rest and rolls downhill on tracks from an outback mine. A spring with k = 400 000 N/m is located at the end of the tracks. At the spring's maximum compression, the car is at an elevation 10 m lower than its elevation at the starting point. How much is the spring compressed in stopping the ore car? Ignore friction.

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The Answer of An ore car of mass 4000 kg starts from rest and rolls downhill on tracks from an outback mine. A spring with k = 400 000 N/m is located at the end of the tracks. At the spring's maximum compression, the car is at an elevation 10 m lower than its elevation at the starting point. How much is the spring compressed in stopping the ore car? Ignore friction.

An Ore Car of Mass 4000 Kg Starts from Rest