A bullet of mass $m$ moving with a speed $v$ strikes a wooden block of mass $M$ and gets embedded into the block. The final speed is
A bullet of mass $m$ moving with a speed $v$ strikes a wooden block of mass $M$ and gets embedded into the block. The final speed is
- A
$\sqrt {\frac{M}{{M + m}}} v$
- B
$\sqrt {\frac{m}{{M + m}}} v$
- C
$\frac{m}{{M + m}}v$
- D
$\frac {v}{2}$
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