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 |
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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 |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

Let be the mass of each disc. Let and be the radii of discs and , respectively. Then As so Now, i.e., |

127 votes

127