question_answer

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                                                 [AIEEE 2011]

A)   First increase and then decrease

B)   Remains unchanged

C)   Continuously decreases

D)   Continuously increases

Correct Answer: A

Solution :

Constant

I first decreases, then increases.

first increases and then decreases