A lead pellet with mass $10.0\,\text{g}$ is fired horizontally at a stationary wooden block of mass $100\,\text{g}$. The pellet strikes the block with an impact velocity of $250\,\text{m s}^{-1}$. It becomes embedded in the block and does not come out. What is the speed of the block immediately after the pellet has become embedded?
- A$23\,\text{m s}^{-1}$
- B$25\,\text{m s}^{-1}$
- C$75\,\text{m s}^{-1}$
- D$79\,\text{m s}^{-1}$