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Amplitude of a mass-spring system, which...

Amplitude of a mass-spring system, which is executing simple harmonic motion decreases with time. If mass=500g, Decay constant=20 g/s then how much time is required for the amplitude of the system to drop to half of its initial value ? (In 2=0.693)

A

`17.32 s`

B

`0.034s`

C

`34.65`s

D

`15.01 s`

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