A thin horizontal circular disc is roating 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
continuously decreases
B
comtinuously increases
C
first increases and then decreases
D
remains unchanged
Text Solution
Verified by Experts
The correct Answer is:
C
(c ) As insect moves along a diameter, the effective mass and hence the M.I. first decreases then increases so for principal of conservation of angular momentum, angular speed, first increases then decreases.
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