AIPMT PRELIMS2010Physics-Circular Motion
AIPMT PRELIMS 2010 Physics Centripetal Force MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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
A
r ≥ μg/ω²
B
r = μgω²
C
r < ω²/μg
D
r ≤ μg/ω²
Correct Answer
Option D
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.
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