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

The change in velocity when the particle completes half revolution is given by∆v = 5 m/s-(-5 m/s) = 10 m/sTime taken to complete half revolutiont = πrv = π×55 = π secAverage acceleration = ∆vt = 10πm/s2