Question

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

Answer: (D)

Angular acceleration is the rate of change of angular speed or angular velocity if $\vec{\omega}$ remains constant then $\alpha=0$