A circular disc of radius 
and thickness 
has moment of inertia 
about an axis passing through its centre and perpendicular to its plane. It is melted and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is
a)
b)
c)
d)
A circular disc of radius and thickness has moment of inertia about an axis passing through its centre and perpendicular to its plane. It is melted and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is
a)
b)
c)
d)
Question ID - 53928 | SaraNextGen Top Answer
A circular disc of radius and thickness has moment of inertia about an axis passing through its centre and perpendicular to its plane. It is melted and recasted into a solid sphere. The moment of inertia of the sphere about its diameter as axis of rotation is
a)
b)
c)
d)
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A circular disc of radius |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (c) -
(c)
According to problem disc is melted and recasted into a solid sphere so their volume will be same
Moment of inertia of disc 
[Given]
Moment of inertia of sphere 
127 votes
Answer Link
127