A) \[0.05m/s\]
B) \[0.5m/s\]
C) \[0.1m/s\]
D) \[0.2m/s\]
Correct Answer: D
Solution :
From law of conservation of momentum total initial momentum = total final momentum \[{{m}_{1}}{{u}_{1}}+{{m}_{2}}{{u}_{2}}={{m}_{1}}{{v}_{1}}+{{m}_{2}}{{v}_{2}}\] \[0.1\times 0+50\times 0=0.1\times 100+50(-{{v}_{2}})\] \[=0-50{{v}_{2}}\] \[{{v}_{2}}=\frac{10}{50}=0.2m/s\]
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