Exam-style question
Try this first
How does the moment of inertia change if the mass of an object is doubled while keeping its radius constant?.
- A.It doubles.
- B.It quadruples.
- C.It remains the same.
- D.It halves.
Model answer
What a good answer should say
- It doubles.
Explanation
Why this works
The moment of inertia (I) is directly proportional to mass (m). If the mass is doubled and the radius remains constant, the moment of inertia also doubles, as I = k * m, where k is a constant dependent on the shape.
Common mistake
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