Question

A particle is revolving in a circular path of radius $25m$ with constant angular speed $12rev/min$. Then the angular acceleration of particle is

• A. $2{\pi }^{2}rad/s^2$
• B. $4{\pi }^{2}rad/s^2$
• C. ${\pi }^{2}rad/s^2$
• D. Zero

Answer 1

The correct option is D Zero

Given that angular speed is constant.

If the circular path remains in the same plane without the change in the sense of rotation( clockwise or anticlockwise) then the direction of angular velocity will not change.

Angular acceleration is the rate of change in angular velocity.

When the angular velocity is constant, angular acceleration is zero.