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A partical is moving along a circular pa...

A partical is moving along a circular path of radius `5m` and with uniform speed `5 m//s`. What will be the avarage acceleration when the partical completes half revoluation?

A

Zero

B

`10 ms^(-2)`

C

`10 pi ms^(-2)`

D

`(10)/(pi) ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
D
When the particle completes halfrevoBution, change in velocity
`Deltav=[5-(-5)] ms^(-1)=10 ms^(-1)`
time taken to complete the half revolution is
`t=(pir)/(v)=(pixx5)/(4)pi `second
Thus, average acceleration
`a_(n)=(Deltav)/(t)=(10)/(pi).ms^(-2)`
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