Exam-style question
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How does increasing the radius of a rotating object affect its moment of inertia?.
- A.Moment of inertia increases
- B.Moment of inertia decreases
- C.Moment of inertia remains the same
- D.Moment of inertia becomes zero
Model answer
What a good answer should say
- Moment of inertia increases
Explanation
Why this works
The moment of inertia (I) is calculated using I = Σ(m * r²), where m is mass and r is the distance from the axis of rotation. Increasing the radius increases the value of r², thus increasing the moment of inertia.
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