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Question

TWO EQUAL MASSES ARE ATTACHED TO TWO ENDS OF A SPRING CONST. k THE MASSES ARE PULLED OUT SYMMETRICALLY TO STRECH SPRING BY A LENTH x OVER ITS NATURAL LENTH. WORK DONE BY THE SPRING ON EACH MASS IS -1/4kx^2.HOW

Joshi sir comment

total work done on the spring = 1/2kx²

so work done by the spring = -1/2kx²

this work is done on 2 masses so work done by the spring on 1 mass = -1/4kx²

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