A weightless spring which has a force constant oscillates with frequency \( n \) when a mass \( ...

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A weightless spring which has a force constant oscillates with frequency \( n \) when a mass \( m \) is suspended from it. The spring is cut into two equal halves and a mass \( 2 \mathrm{~m} \) is suspended from one half. The frequency of oscillation will now become
(a) \( n \)
(b) \( 2 n \)
(c) \( n / \sqrt{2} \)
(d) \( n(2)^{1 / 2} \)
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