A thin circular ring of mass M and radius R is rotating in a horizontal plane about

A Thin Circular Ring Of Mass M And Radius R Physics Question

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:

  1. Velocities of sound measured in hydrogen and oxygen gas at a given temperature
  2. A round uniform body of radius R, mass M and moment of inertia I rolls down
  3. In an NPN transistor the collector current is 24 mA. If 80% of the electrons
  4. The time period of a simple pendulum in a lift descending with constant acceleration g is
  5. Small drops of the same size are charges to V volt each. If n such drops coalesce

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.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*