A) \[45\sqrt{2}\,m{{s}^{-1}}\]
B) \[45\,m{{s}^{-1}}\]
C) \[90\,m{{s}^{-1}}\]
D) \[22.5\sqrt{2}\,m{{s}^{-1}}\]
Correct Answer: B
Solution :
Initial momentum \[\vec{P}=m45\sqrt{2}\ \hat{i}+m45\sqrt{2}\ \hat{j}\]Þ \[|\vec{P}|=m\times 90\] Final momentum \[2m\times V\] By conservation of momentum \[2m\times V=m\times 90\] \\[V=45\,m/s\]You need to login to perform this action.
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