JEE Main Physics question
A thin horizontal circular disc is rotating about a vertical axis passing through its centre. An insect is at rest at a point near the rim of the disc. The insect now moves along a diameter of the disc to reach the other end. During the insect's journey, the angular speed of the disc
Answer: (C)
Solution
As the insect moves from the rim toward the centre, the system's moment of inertia decreases, so by conservation of angular momentum ( const),
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