A) \[\frac{10}{\pi }m/{{s}^{2}}\]
B) \[10\,m/{{s}^{2}}\]
C) \[10\pi \,m/{{s}^{2}}\]
D) zero
Correct Answer: A
Solution :
Change in velocity when the particle completes half revolution is \[\Delta v=5-(-5)\] \[=10\,m/s\] Time taken in completing half revolution is \[T=\frac{\pi r}{v}=\frac{\pi \times 5}{5}=\pi \text{second}\] Hence, average acceleration when particle completes half revolution \[{{a}_{av}}=\frac{\Delta v}{T}=\frac{10}{\pi }\,m/{{s}^{2}}\]You need to login to perform this action.
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