Two springs A and B with spring constant 2K and K are stretched separately by some force F. Then the ratio of work done in stretching A to that in stretching B is

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4 : 1

1 : 4

1 : 2

2 : 1

answer is C.

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Detailed Solution

W=12Kx2=12KFK2=F22K∴ WAWB=KBKA=K2K=12

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