Two thin discs, each of mass and radius m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc passing through its centre is

a) |
b) |
c) |
4 |
d) |

Two thin discs, each of mass and radius m, are attached as shown in Figure, to form a rigid body. The rotional inertia of this body about an axis perpendicular to the plane of disc passing through its centre is

a) |
b) |
c) |
4 |
d) |

1 Answer - 5876 Votes

3537

Moment of inertia of discs and about the axis through their centre of mass and perpendicular to the plane will be Now, moment of inertia of disc about an axis through by theorem of parallel axis will be So |