A particle is moving along a circular path of radius 5 m with a uniform speed 5 m s⁻¹. What is the magnitude of average acceleration during the interval in which particle completes half revolution?
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Question

A particle is moving along a circular path of radius 5 m with a uniform speed 5 m s⁻¹. What is the magnitude of average acceleration during the interval in which particle completes half revolution?

G1 Physics · Accepted Answer

Over a half revolution, the velocity reverses, so |Δv⃗|=2v=10 m/s. The time is half-period t=πR/v=π×5/5=π s. Hence average acceleration magnitude=10/π m/s², option A.