Question

A torque of 2×10^-4 Nm is applied to produce an angular acceleration of 4rad/s^2 in a rotating body. What is the moment of inertia of the body?

(a) 0.5 kgm^2

(b) 5×10^4 kgm^2

(c) 0.5×10^-4 kgm^2

(d) 0.5×10^4 kgm^2

This question was posed to me in homework.

I'd like to ask this question from Centripetal Force in division Kinematics of Engineering Physics I

Answer 1

Correct choice is (c) 0.5×10^-4 kgm^2

For explanation: Torque = Iα

I = Torque/α = (2×10^-4)/4=0.5×10^-4 kgm^2.