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Physics - NLM Question with Solution | TestHub

PhysicsNLMFrictionMedium2 minPYQ_2010

PhysicsMediumsingle choice

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 ifNEET 2010 (Screening)

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Answer:

Solution:

When the disc spins the frictional force between the gramophone record and coin is $μ mg$ The coin will revolve with record, if $F_{frictional} μ m g \frac{μg}{r} \geq F_{centripetal} \geq m ω^{2} r \geq ω^{2}$

Stream:NEETSubject:PhysicsTopic:NLMSubtopic:Friction

⏱ 2mℹ️ Source: PYQ_2010

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