Initial angular velocity of a circular disc of mass M is . Then two small spheres of mass are attached gently to two diametrically opposite points on the edge of the disc What is the final angular velocity of the disc ?
Option 1) | Option 2) |
Option 3) | Option 4) |
As we learn in
Law of conservation of angular moment -
- wherein
If net torque is zero
i.e.
angular momentum is conserved only when external torque is zero .
Option 1)
This is an incorrect option.
Option 2)
This is an incorrect option.
Option 3)
This is the correct option.
Option 4)
This is an incorrect option.
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