Q17 of 46 Page 458

By what fraction does the mass of a spring change when it is compressed by 1 cm? The mass of the spring is 200g at its natural length and the spring constant is 500 N m–1.

There is a physical significance of special theory of relativity that Energy and mass are interchangeable and that is given by Sir Einstein famous equation E=m


energy possessed by the compressed spring as potential energy is due to loss of the mass



Given:






So, the change in mass of spring will be


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