The moment of inertia of a disc of mass M and radius R about an axis tangent to its circumference and parallel to a diameter is:
Options

Question

The moment of inertia of a disc of mass M and radius R about an axis tangent to its circumference and parallel to a diameter is:

G1 Physics · Accepted Answer

Step 1: About its diameter the disc has I=MR²/4. Step 2: The tangential parallel axis is distance R away, so I=MR²/4+MR²=5MR²/4. Final answer: D — (5/4)MR².