The length k in that expression is called the radius of:
AGeodesy
BGyration
CGyroscope
DGeometry
Answer & Solution
Correct answer: B. Gyration
1. It relates moment of inertia to total mass.
2. It is a distance from the axis.
3. It is the radius of gyration.
_Source: NCERT Class 11 Physics, Ch 6 'Systems of Particles and Rotational Motion'_
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