Question

find the radius of gyration of a uniform disc about an axis perpendicular to its plane and passing through its centre​

Answer 1

Answer:

Moment of Inertia of disc about center of mass is I=

2

mR

2

Let a line parallel to axis at a distance d.

Radius of Gyration=R

Then,

2

mR

2

=mR

2

⇒R

2

=

2

R

2

⇒R=

2

R