A) \[1\text{ }m/s\]
B) \[0.5\text{ }m/s\]
C) \[4m/s\]
D) \[0.25\text{ }m/s\]
Correct Answer: A
Solution :
According to conservation of linear momentum \[0={{m}_{1}}{{v}_{1}}+{{m}_{2}}{{v}_{2}}\] \[0=1\times 2\times 2\times {{v}^{2}}\] \[{{v}_{2}}=-1m/s\] Negative sign shows that \[2\text{ }kg\]is pulled in a opposite direction to that of mass\[\text{1 }kg\].You need to login to perform this action.
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