Which of the following expressions correctly relates the net external torque acting…

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

Which of the following expressions correctly relates the net external torque

\sum \tau

acting on a rigid body about a fixed axis, its rotational inertia

I

, and its angular acceleration

\alpha

? (a)

\sum \tau = I\omega^{2}

(b)

\sum \tau = I\,\alpha\,\Delta\theta

(c)

\sum \tau = I\,\alpha

(d)

\sum \tau = \dfrac{1}{2} I\,\omega^{2}