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A mass m is attached to two strings as shown in figure. The spring constants of two springs are K 1 and K 2 . For the frictionless surface, the time period of oscillation of mass m is-

1. 2 1 K K m 2 + π
2. m K K 2 1 2 1 − π
3. 2 1 K K m 2 − π
4. m K K 2 1 2 1 + π

Correct answer: 2 1 K K m 2 + π

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