Q 1158867704.     A particle is moving along a circular path of radius`r=5/πm|` with a uniform speed `5 m//s.` What is the magnitude of average acceleration `text((in)` `m//s^2)` during the interval in which particle completes half revolution ?


A

`2 m//s^2`

B

`20 m//s^2`

C

`10 m//s^2`

D

`5 m//s^2`

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