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  • A disc of mass '  m ' and radius ' r ' is slidling on a smooth horizontal Plane with the velocity ' v '. It it enters a rough horizontal surface, then wh

A disc of mass '  m ' and radius ' r ' is slidling on a smooth horizontal Plane with the velocity ' v '. It it enters a rough horizontal surface, then which statement is incorrectly mentioned about the behaviour of the disc on the rough plane.

Option: 1

The disc will start rolling immediately after reaching the rough surface.


Option: 2

The friction will act in the backward direction that slows the disc.


Option: 3

Rough surface will apply maximum frictional force on the disc


Option: 4

The frictional fore will provide torque about the centre of the ring to increase its angular velocity.


Answers (1)

best_answer

Ring will take some time to achieve the pure rolling.

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