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 :

A
$\sqrt{2} T$
B
T
C
$\frac{T}{\sqrt{2}}$
D
2T

Solution:

$T = 2 π \sqrt{\frac{M}{k}}, T' = 2 π \sqrt{\frac{2 M}{k}} \Rightarrow T' = \sqrt{2} T$

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