A motor delivers a constant torque to a solid turntable of rotational inertia
PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics
Problem
A motor delivers a constant torque τ to a solid turntable of rotational inertia I, producing an angular acceleration α. The turntable is replaced with another having a rotational inertia of 3I, and the motor speed controller is left unchanged so the motor still supplies the same angular acceleration α. Which of the following best describes the torque the motor must now supply?
(a) 3τ
(b) τ
(c) 3τ
(d) 9τ