A) \[2v\,\sin \,(\theta /2)\]
B) \[v\,\sin \,\theta \]
C) \[2v\,\cos \,(\theta /2)\]
D) \[v\,\cos \,\theta \]
Correct Answer: A
Solution :
[a] \[{{v}_{p}}=\sqrt{{{v}^{2}}+{{v}^{2}}+2vv\cos (180-\theta )}\] \[\Rightarrow {{v}_{p}}=\sqrt{2{{v}^{2}}[1-cos\theta ]}\] \[=2v\sin (\theta /2)\]You need to login to perform this action.
You will be redirected in
3 sec