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Four particles each of mass.m. are place...

Four particles each of mass.m. are placed at the corners of a square of side .U. The radius of gyration of the system about an axis normal to the square and passing through its centre is:

A

`L//sqrt(2)`

B

`L//2`

C

L

D

`sqrt(2)L`

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The correct Answer is:
A
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