Radius Of Gyration
A body has a moment of inertia of 20 kg·m² and mass 5 kg. What is its radius of gyration?
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About This Question
- Subject
- physics
- Chapter
- rotational motion
- Topic
- radius of gyration
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
2 m
- Definition: Radius of gyration (k) is the effective distance from the axis at which the whole mass (M) can be considered concentrated to keep I the same.
- Formula: I=Mk2.
- Transpose: k=I/M.
- Calculation:
- k=20/5=4.
- Result: k=2 m.
This easy difficulty physics question is from the chapter rotational motion, covering the topic of radius of gyration. It appeared in the 2025 exam.
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