Two circular discs 
and 
are of equal masses and thicknesses but made of metal with densities 
and
If their moments of inertia about an axis passing through their centres and perpendicular to circular faces are 
and 
,then
a)
b)
c)
d)
Two circular discs and are of equal masses and thicknesses but made of metal with densities and If their moments of inertia about an axis passing through their centres and perpendicular to circular faces are and ,then
a)
b)
c)
d)
Question ID - 100112 | SaraNextGen Top Answer
Two circular discs and are of equal masses and thicknesses but made of metal with densities and If their moments of inertia about an axis passing through their centres and perpendicular to circular faces are and ,then
a)
b)
c)
d)
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Two circular discs |
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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) -
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(c) Let As
|
be the mass of each disc. Let 
and
be the radii of discs 
and
, respectively. Then 
so 
Now,
i.e.,
127 votes
Answer Link
127