Q: 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 ?
(A) zero
(B) 10 m/s2
(C) 10 π m/s2
(D) 10/π m/s2
Click to See Answer :
Solution : The change in velocity when the particle completes half revolution is given by
Δv = 5 m/s – (-5 m/s) = 10 m/s
Time taken to complete half revolution
t = π r/v = π×5/5 = π
Average acceleration = Δv/Δt =10/π m/s2