| ⇦ | 
| ⇨ |
A gramophone record is revolving with an angular velocity ?. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is µ. The coin will resolve with the record if:
Options
(a) r = µ g ?ￂﾲ
(b) r < ?ￂﾲ / µ g
(c) r <= µ g / ?ￂﾲ
(d) r >= µ g / ?ￂﾲ
Correct Answer:
r <= µ g / ?ￂﾲ
Explanation:
For the coin to revolve with the record, centrifugal force <= frictional force mr ?ￂﾲ <= µ mg r <= µg / ?ￂﾲ
Related Questions: - An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into
- If a given volume of water in a 220V heater is boiled in 5 min, then same volume
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Initial angular velocity of a circular disc of mass M is ?￢ﾂﾁ.Then, two small spheres
- Which of the following phenomena does not show the wavenature of light?
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 electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into
- If a given volume of water in a 220V heater is boiled in 5 min, then same volume
- Current in a coil changes from 4 A to zero in 0.1 second and the emf induced is 100V
- Initial angular velocity of a circular disc of mass M is ?￢ﾂﾁ.Then, two small spheres
- Which of the following phenomena does not show the wavenature of light?
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