Verified Solution • 2025–26 Session moderate

QAIPMT-2010-Ph-2041: NEET 2010 Physics - Class 11 AIPMT-2010-Ph-2041 Solution: A gramophone record is revolving with an angular velocity \(…

A gramophone record is revolving with an angular velocity ω\omega. A coin is placed at a distance r from the centre of the record. The static coefficient of friction is μ\mu. The coin will revolve with the record if

Multiple Choice Options

  • A r=μgω2r=\mu g\omega^2
  • B r<μgω2r<\frac{\mu g}{\omega^2}
  • C r≤ω2μgr\le\frac{\omega^2}{\mu g}
  • D r≥μgω2r\ge\frac{\mu g}{\omega^2}

Step-by-Step Verified Solution

The coin will revolve with the record, if Force of friction � Centrifugal force _ m g � m r _ 2 _ r � _ g _ 2

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