A) \[3\,v\,\cos \,\theta \]
B) \[2\,v\,\cos \,\theta \]
C) \[\frac{3}{2}\,v\,\cos \,\theta \]
D) \[\frac{\sqrt{3}}{2}\,v\,\cos \,\theta \]
Correct Answer: A
Solution :
We know, Initial momentum \[=\] Final momentum \[\therefore \] \[mv\cos \theta =\frac{m}{2}\times {{v}_{1}}-\frac{m}{2}\times v\cos \theta \] \[\Rightarrow \] \[2v\cos \theta ={{v}_{1}}-\cos \theta \] \[\Rightarrow \] \[{{v}_{1}}=3v\cos \theta \]You need to login to perform this action.
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