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Moment of inertia of a DISC is considered one of the most asked concept.
12 Questions around this concept.
The moment of inertia of a uniform semicircular disc of mass M and radius about a line perpendicular to the plane of the disc through the center is :d
A circular disc X of radius R is made from an iron plate of thickness and another disc Y of radius is made from an iron plate of thickness . Then the relation between the moment of inertia. and is
Let I=Moment of inertia of a DISC about an axis through its centre and perpendicular to its plane
To calculate I
Consider a circular disc of mass M, radius R and centre O.
And mass per unit area =
Take an elementary ring of mass dm of radius x as shown in figure
So,
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