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A mass (M) attached to a spring, oscilla...

A mass (M) attached to a spring, oscillates with a period of (2 sec). If the mass in increased by (2 kg) the period increases by one sec. Find the initial mass (M) assuming that Hook's Law is obeyed.

A

1.6 kg

B

3.9 kg

C

9.6 kg

D

12.6 kg

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The correct Answer is:
A
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