Q. If the equation for the displacement of a particle moving on a circular path is given by $(\theta) = 2t^{3} + 0.5$, where $\theta$ is in radians and $t$ in seconds, then the angular velocity of the particle after $2\ sec$ from its start is

A) $8\ rad/sec$
B) $12\ rad/sec$
C) $24\ rad/sec$
D) $36\ rad/sec$
Explanation

(c) $\omega = \frac{d\theta}{dt} = \frac{d}{dt}\left( 2t^{3} + 0.5 \right) = 6t^{2}$
At $t = 2\ s,\ \omega = 6 \times (2)^{2} = 24\ rad/s$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.