Question

11.
A particle is moving along a circular path of radius 5 m with a uniform speed 5 ms-1. The average
[
acceleration when the particle completes half revolution is
a) zero
b) 10 ms-2
c) 10π ms-2
d)10/π ms-2
​

Answer 1

Answer:

Correct option is D)

When the particle completes half revolution change in velocity

Δv=[5−(−5)]m/s=10m/s

Time taken to complete the half revolution is

t= πr/v = π×5/5 =πs

Thus, average acceleration = Δv/t = 10/π m/s^2

Answer 2

Explanation:

D. 10/ π ms-2

when the particles completed half revolution changes in the velocity

∆v=(5-(-5) m/s=10m/s

we take time to complete the half revolution is the=

πr/v=π×5/5=5/5.