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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
- When a light beam of frequency v is incident on a metal surface,
- A student performs an experiment to determine the Young’s modulus of a wire
- In a coil having e.m.f. of 8 V induced for 0.05 s. The value of current changes
- The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
- A hollow metal sphere of radius 10 cm is charged such that the potential on its surface
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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.