An ore car of mass 41000 kg starts from rest and rolls downhill on tracks from a mine. At the end of the tracks, 22m lower vertically, is a horizontally situated spring with constant 2.8 X 10(5th) N/m. Acceleration of gravity is 9.8 m/s squared.
How much is the spring compressed in stopping the ore car--answer in units of m (answer 4.145 m is wrong)--what is the correct answer with correct number of significant digits?