Physics > Mechanics > Work Energy And Power

A simple pendulum of length 1 m has a wooden bob of mass 1 kg. It is struck by a bullet of mass $10^{-2}$ kg moving with a speed of $2 \times 10^2\ \text{ms}^{-1}$. The bullet gets embedded into the bob. The height to which the bob rises before swinging back is: (use $g = 10\ \text{m/s}^2$)