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Kinetic Energy

Out of a pair...

Question

Out of a pair of identical springs of spring constants 240 N/m, one is compressed by 10 cm and other is stretched by 10 cm. The difference in P.E. stored in the two springs is:

1.2 J

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4 J

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Zero

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12 J

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Solution

The correct option is C
Zero

In both cases the P.E. will be kx²/2.

Hence. the difference of energies will be zero.

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