A) \[5\,m/s\]
B) \[1\,m/s\]
C) \[0.5\,m/s\]
D) \[10\,m/s\]
Correct Answer: D
Solution :
According to conservation of momentum \[{{m}_{B}}{{v}_{B}}+{{m}_{G}}{{v}_{G}}=0\] Þ \[{{v}_{G}}=-\frac{{{m}_{B}}{{v}_{B}}}{{{m}_{G}}}\] \[{{v}_{G}}=\frac{-50\times {{10}^{-3}}\times {{10}^{3}}}{5}=-10\,m/s\]
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