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A wagon of 35 kN moves at a speed of 3.6 Km/h. Find the number of Springs required in a buffer stop to absorb the

A wagon of 35 kN moves at a speed of 3.6 Km/h. Find the number of Springs required in a buffer stop to absorb the energy of motion during compression of 180 mm? The mean diameter of coils is 220 mm and the diameter of the steel rod of the spring is 24 mm. Each spring consists of 30 coils. G=90 GPA.

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