An engine is attached to a wagon through


An engine is attached to a wagon through a shock absorber of length 1.5 m. The system with a total mass of 50,000 kg is moving with a speed of 36 km/h when the brakes are applied to bring it to rest. In the process of the system being brought to rest, the spring of the shock absorber gets compressed by 1.0 m. If 90% of the energy of the wagon is lost due to friction, calculate the spring constant.


KE = 1/2 mv2

m = 50000 kg

v = 10 m/s

KE = 2500000J

KE of spring = 10% of the KE wagon

K = 5 × 105 N/m

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