An industrial flywheel has a greater rotational inertia when most of its mass is
A)nearest the rim.
B)nearest the axis.
C)uniformly spread out as in a disk.

Question

Quizplus · Accepted Answer

Rotational inertia depends on the distribution of mass and the distance of that mass from the axis of rotation. The farther the mass is from the axis, the greater the contribution to the overall rotational inertia. In the case of an industrial flywheel, a majority of the mass is concentrated towards the rim of the flywheel, which leads to a larger rotational inertia. Thus, option A) nearest the rim is the correct choice.

An Industrial Flywheel Has a Greater Rotational Inertia When Most