Recoil of a gun or artillery piece firing a shell

1. A.
   $200kgm/s,5\text{ }m/s$
2. B.
   $0.2kgm/s,5\text{ }m/s$
3. C.
   $0.2kgm/s,5\text{ }cm/s$
4. D.
   $200kgm/s,5\text{ }cm/s$

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1. A.
   $M_{1}/\left( M_{1} + M_{2} \right)$
2. B.
   $\frac{M_{2}}{M_{1}}$
3. C.
   $M_{2}/\left( M_{1} + M_{2} \right)$
4. D.
   $\frac{M_{1}}{M_{2}}$

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