A) \[v\,\cos \left( \frac{1}{2}\theta \right)\]
B) \[2v\,\cos \left( \frac{1}{2}\theta \right)\]
C) \[v\,sin\left( \frac{\theta }{2} \right)\]
D) \[v\,(sin\,\theta )\]
Correct Answer: B
Solution :
[b] \[{{v}_{p}}=\sqrt{{{v}^{2}}+{{v}^{2}}+2{{v}^{2}}\cos \theta }=\sqrt{2{{v}^{2}}(1+\cos \theta )}\] \[=2v\,\cos \theta /2\]You need to login to perform this action.
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