AIPMT PRELIMS 2010 Physics Centripetal Force MCQ Question
A gramophone record is revolving with an angular velocity ω. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ. The coin will revolve with the record if
r ≥ μg/ω²
r = μgω²
r < ω²/μg
r ≤ μg/ω²
Correct Answer
Detailed Explanation
The coin will revolve with the record if the frictional force is sufficient to provide the necessary centripetal force. This condition is satisfied when r ≤ μg/ω².
Found an issue with this question?
Related Questions
More from 2010
Consider the following four statements (a–d) regarding kidney transplant and select the two correct ones out of these. a. Even if a kidney transplant...
Which one of the following statements is correct with respect to AIDS?
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of water in the capillary tube is 5 g. Another capilla...