The moment of inertia of a uniform circular disc of radius R and mass M about an axis passing from the edge of the disc and normal to the disc is :
A
B
MR 2
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
We should use parallel axis theorem
Moment of inertia of disc passing through its centre of gravity and perpendicular to its plane is
Ι AB = 
Using theorem of parallel axes, we have,
Ι CD = Ι AB + MR 2
= 
= 
Note : The role of moment of inertia in the study of rotational motion is analogous to that of mass in study of linear motion.
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