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

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

(a) Zero

(b) 10 m/s-2

(c) 10 π m/s-2

(d) 10/π m/s-2

Click to See Answer :
Ans: (d)

Sol: when particle completes half revolution , then change in velocity = 10 m/s

average acceleration = change in velocity/time taken

$\displaystyle = \frac{10}{5 \pi/5} = \frac{10}{\pi}$