Q. A torque of $50\ Nm$ acting on a wheel at rest rotates it through $200\ radians$ in $5\ sec$. Calculate the angular acceleration produced
A) $8\ rad\ s{ec}^{- 2}$
B) $4\ rad\ s{ec}^{- 2}$
C) $16\ rad\ s{ec}^{- 2}$
D) $12\ rad\ s{ec}^{- 2}$
Explanation
(c) $\theta = \omega_{0}t + \frac{1}{2}\alpha t^{2} \Rightarrow 200 = \frac{1}{2}\alpha(5)^{2} \Rightarrow \alpha = 16rad/s^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.