A round disc of moment of inertia about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia rotating with an angular velocity about the same axis. The final angular velocity of the combination of discs is |
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A round disc of moment of inertia about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia rotating with an angular velocity about the same axis. The final angular velocity of the combination of discs is |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

The angular momentum of a disc of moment of inertia and rotating about its axis with angular velocity is When a round disc of moment of inertia is placed on first disc, then angular momentum of the combination is In the absence of any external torque, angular momentum remains conserved, ., |

127 votes

127