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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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(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Ratio of the radii of the nuclei with mass numbers 8 and 27 would be
- 1 Wb/m² equal to
- An electron in a circular orbit of radius 0.05 nm performs 10¹⁶ rev/s. The magnetic
- In an unbiased p-n junction, holes diffuse from the p-region to n-region because of
- A gas of monoatomic hydrogen is bombarded with a stream of electrons
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.