Moment of inertia of a body about a given axis is $1.5 \mathrm{~kg} \mathrm{~m}^2$. Initially the bo

Question

Moment of inertia of a body about a given axis is $1.5 \mathrm{~kg} \mathrm{~m}^2$. Initially the body is at rest. In order to produce rotational kinetic energy of 1200 J , the angular acceleration of $20 \mathrm{rad} / \mathrm{s}^2$ must be applied about the axis for a duration of

Professor PC Thomas Classes · Answer

$K = \frac{1}{2} I \omega^2$. Find $\omega$, then $\alpha$, then torque.