To increase the rotational inertia of a solid disk about its axis without changing its mass:
A)drill holes near the rim and put the material near the axis
B)drill holes near the axis and put the material near the rim
C)drill holes at points on a circle near the rim and put the material at points between the holes
D)drill holes at points on a circle near the axis and put the material at points between the holes
E)do none of the above (the rotational inertia cannot be changed without changing the mass)

Question

Quizplus · Accepted Answer

Rotational inertia depends on how mass is distributed relative to the axis of rotation. Moving mass farther from the axis increases rotational inertia, so moving material from near the axis to near the rim increases the disk's rotational inertia.

To Increase the Rotational Inertia of a Solid Disk About