A) \[u+v\]
B) \[2\,u+v\]
C) \[u-v\]
D) \[u-\frac{1}{2}v\]
Correct Answer: C
Solution :
Since, \[\vec{u}\] and \[\vec{v}\] are in opposite directions, therefore angle between them is\[{{180}^{o}}\]. Now, magnitude of resultant velocity is \[\sqrt{{{u}^{2}}+{{v}^{2}}+2uv\,\cos \,{{180}^{o}}}\] \[=\sqrt{{{u}^{2}}+{{v}^{2}}-2uv}=u-v\]You need to login to perform this action.
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