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A spring of force constant 'k' is cut in...

A spring of force constant 'k' is cut into four equal parts one part is attached with a mass m. The time period of oscillation will be

A

`pi sqrt(m/k)`

B

`2pi sqrt(m/(2k))`

C

`(pi/2) sqrt(m/(2k))`

D

`2pi sqrt(m/k)`

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