Knockout JEE Main April 2021 (One Month)
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A thin circular ring of mass m and radius R is rotating about its axis with a constant angular velocity .Two objects each of mass M are attached gently to the opposite ends of a diameter of the ring. The ring now rotates with an angular velocity
=
Option 1)
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Option 2)
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Option 3)
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Option 4)
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As we learnt 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 .
From conservation of Angular Momentum
Option 1)
This is the correct option.
Option 2)
This is an incorrect option.
Option 3)
This is an incorrect option.
Option 4)
This is an incorrect option.