A mass of `0.98 kg` suspended using a spring of constant `K = 300 Nm^(-1)` is hit by a bullet of `20g` moving with a velocity `3m//s` vertically. The bullet gets embeded and oscillates with the mass. The amplitude of oscillation is (neglect gravity)

Options

A. `0.15 cm`
B. `0.35 cm`
C. `1.2 cm`
D. `12m`

Answer

B

Explanation

From `LCLM, (M+m)v = mu rarr (1)`
From `LCE,(1)/(2)(M+m) v^(2) =(1)/(2)KA^(2)`