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 its other end. During the journey of the insect the angular speed of the disc

• A. First increase and then decrease
• B. Remains unchanged
• C. Continuously decreases
• D. Continuously increases

Answer 1

Answer: (A)

First increase and then decrease

Answer 2

$L=I \omega=$ Constant I first decreases, then increases. $\Rightarrow \omega$ first increases and then decreases