Question

A mass M is suspended from a light spring. An additional mass m added displaces the spring further by a distance x. Now the combined mass will oscillate on the spring with period

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

As mg produces extension x , hence k = $\frac{mg}{x}$

$\therefore =2\pi \sqrt{\frac{(M+m)}{k}}=2\pi \sqrt{\frac{(M+m)x}{mg}}$