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Consider the situation shown in figure. Initially the spring is unstretched when the system is released from rest. Assuming no friction in the puley, find the maximum eleongation of the spring.

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The correct Answer is:
B
Mass of the body `=m `
Let the elongation be x
`So, 1/2 kx^2=mgh`
`rarrx=2 mg/k`
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HC VERMA-WORK AND ENERGY-Exercises
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