Four particles each of mass `m` are placed at the corners of a square of side length `l`. The radius of gyration of the system the moment of inertia of four bodies about an axis passing through any side of frame is

Options

A. `4ML^(2)`
B. `2sqrt(2)ML^(2)`
C. `2ML^(2)`
D. `sqrt(2)ML^(2)`

Answer

C

Explanation

`I=ML^(2)+ML^(2)=2ML^(2)`