A particle is moving along a circular path of radius 5m with a uniform speed of 5m/s. What will be the average acceleration when the particle completes the half revolution? (Ans : 10/pi m/s)

average acceleration = total displacement/ time = (Diameter)/ (time taken)

d = 2r = 2*5 =10m, v = 5m/s

time = πr/v

=>t = π*5/5 = π s

=> average acceleration = (10/π) m/s2.

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