Hey,
Considering that the velocity of particle is uniform, then
When the particle completes half revolution change in velocity
Δv=[v−(−v)] = 2v m/s
Time taken to complete the half revolution is t=πr/v sec
Thus, average acceleration =Δv/t=2v/(πr/v)
Avg. Acceleration is = 2vv/πr
Hope it helps!
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