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A small part of the rim of a fly wheel breaks off while it is rotating at a constant angular speed. Then its radius of gyration will
Options
(a) Increase
(b) Decrease
(c) Remain unchanged
(d) Nothing definite can be said
Correct Answer:
Decrease
Explanation:
Iω is conserved. If a small piece is broken. I will be less and ω will increase But I = mk², as I is less, m is small, k² also will be small. The radius of gyration also will decrease.
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Topics: Motion of system of Particles and Rigid Body
(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An engine pumps water continuously through a hose. Water leaves the hose
- If alpha, beta and gamma rays carry same momentum, which has the longest
- A circular coil of radius 10cm and 100 turns carries a current 1 A.
- A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats
- A particle starts its motion from rest under the action of a constant force
Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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Due to decrease in the mass of the flywheel M.I. decreases. To conserve angular momentum angular velocity of flywheel increases.