A bullet of mass $0.08\mathrm{ }\mathrm{k}\mathrm{g}$ moving with a speed of $100{\mathrm{ }\mathrm{m}\mathrm{s}}^{-1}$ enters a heavy wooden block and stopped. The change in momentum of bullet is ...........$kg m{s}^{-1}$

Given,

$$\begin{gathered} m=0.08 kg \\ v=100 m{s}^{-1} \end{gathered}$$

We know,

Change in momentum $=$Change in velocity $\times$ Mass

                                     $$\begin{gathered} =100\times 0.08 \\ =8 kg m{s}^{-1} \end{gathered}$$

The change in momentum of bullet is $8 kg m{s}^{-1}$.