A) \[\frac{2}{\pi }\]
B) \[\frac{3\pi }{2}\]
C) \[\frac{\pi }{2}\]
D) \[2\pi \]
Correct Answer: C
Solution :
\[\text{Average}\,\text{speed=\bar{S}=}\frac{\text{Distance}}{\text{Time}}\] or, \[\bar{s}=\frac{\pi R}{t}\] Magnitude of average velocity \[=|\vec{v}|\] \[=\frac{\text{Magnitude}\,\text{of}\,\text{displacemennt}}{\text{Time}}\] \[\therefore \] \[\left| \left\langle \left. {\vec{v}} \right\rangle \right. \right|=\frac{2R}{t}\] or, \[\frac{{\bar{s}}}{|\left\langle \left. {\vec{v}} \right\rangle \right.|}=\frac{\pi R}{t\times \left( \frac{2R}{t} \right)}=\frac{\pi }{2}\] Hence, the correction option is [c].You need to login to perform this action.
You will be redirected in
3 sec