A constant torque is applied to a flywheel. Which of the following mechanical quantities will be constant?
A) Rotational energy
B) Angular momentum
C) Rotational velocity
D) Rotational acceleration
E) Linear velocity of a particle on the rim

Question

Quizplus · Accepted Answer

When a constant torque is applied to a flywheel, it results in a constant rotational acceleration due to the relation τ = Iα, where τ is the torque, I is the moment of inertia, and α is the angular acceleration. The other quantities listed (rotational energy, angular momentum, rotational velocity, and linear velocity of a particle on the rim) will change over time as the flywheel speeds up.

A Constant Torque Is Applied to a Flywheel