The period of oscillation of mass M suspended from a spring of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be :

# The period of oscillation of mass M suspended from a spring of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be :

1. A

$\sqrt{2}\mathrm{T}$

2. B

T

3. C

$\frac{\mathrm{T}}{\sqrt{2}}$

4. D

2T

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$\mathrm{T}=2\mathrm{\pi }\sqrt{\frac{\mathrm{M}}{\mathrm{k}}},\mathrm{T}\text{'}=2\mathrm{\pi }\sqrt{\frac{2\mathrm{M}}{\mathrm{k}}}⇒\mathrm{T}\text{'}=\sqrt{2}\mathrm{T}$