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Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
Question
Assertion : A coin is placed on phonogram turn table. The motor is started, coin moves along the moving table.
Reason : The rotating table is providing necessary centripetal force to the coin.
✓

Answer

(d) Within a certain speed of the turn table the frictional force between the coin and the turn table supplies the necessary centripetal force required for circular motion. On further increase of speed, the frictional force cannot supply the necessary centripetal force. Therefore the coin flies off tangentially.

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