Moment of inertia of a uniform disc about an axis
through its centre is 11 and about an axis at a
perpendicular distance d from its centre is 12. If mis
mass of disc then which of the following is necessarily
true?
Answers
Answer:
12=l1 +1d^2
Explanation:
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Given info : Moment of inertia of a uniform disc about an axis through its centre is I₁ and about an axis at a perpendicular distance d from its centre is I₂.
To find : the relation between them if m is the mass of disc.
solution : according to parallel axis theorem, if is the moment of inertia of an object about an axis through its centre of mass and I is the moment of inertia of about an axis passing through a distance d from its centre and mass of the object is m
then,
here, I = I₂ , I_cm = I₁
so, I₂ = I₁ + md²
Therefore the relation among them is I₂ = I₁ + md²
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