| ⇦ | 
| ⇨ |
A thin circular ring of mass M and radius R is rotating in a horizontal plane about an axis vertical to its plane with a constant angular velocity ?. If two objects each of mass m be attached gently to the opposite ends of a diameter of the ring, the ring will then rotate with an angular velocity:
Options
(a) ?M / M + 2m
(b) ? (M + 2m) / M
(c) ?M / M + m
(d) ? (M – 2m) / M + 2m
Correct Answer:
?M / M + 2m
Explanation:
In abstance of external torque, L = I? = constant
I₁?￢ﾂﾁ = I₂?￢ﾂﾂ,I₁ = MR²,I₂ = MR² + 2mR²
(Moment of inertia of a thin ciruclar ring about axis vertical to its plane = MR²)
?￢ﾂﾂ = I₁ / I₂ ⇒ ? = ?M / M + 2m
Related Questions: - If a steel wire of length l and magnetic moment M is bent into a semicircular arc,
- When two identical capacitors are in series, they have 3 μF capacitance
- A very small circular loop of radius a is initially (at t=0) coplanar and concentric
- Dimensions of Torque are
- In nuclear fission, the percentage of mass converted into energy is about
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
- If a steel wire of length l and magnetic moment M is bent into a semicircular arc,
- When two identical capacitors are in series, they have 3 μF capacitance
- A very small circular loop of radius a is initially (at t=0) coplanar and concentric
- Dimensions of Torque are
- In nuclear fission, the percentage of mass converted into energy is about
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
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply