A) \[\frac{{{\upsilon }^{2}}}{\pi r}\]
B) \[\frac{{{\upsilon }^{2}}}{r}\]
C) \[\frac{2{{\upsilon }^{2}}}{\pi r}\]
D) \[\frac{2{{\upsilon }^{2}}}{r}\]
Correct Answer: C
Solution :
[c] After half revolution, change in speed \[=v-(-v)\] \[=2v\] Time taken \[=\frac{\pi r}{v}\] \[\therefore \] Average speed \[=\frac{2v}{{{\pi }^{r/v}}}\] \[=\frac{2{{v}^{2}}}{\pi r}\]You need to login to perform this action.
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