A coin placed on a rotating turntable just slips if it is placed at a distance of 4 cm from centre. If the angular velocity of the turntable is doubled, it will just slip at a distance of :
2 cm
3 cm
8 cm
1 cm
A
1 cm
B
2 cm
C
3 cm
D
8 cm
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Solution
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When the coin is just on the verge of slipping, it just overcomes the force of static friction (Fs) . which acts as centripetal force for being that coin in the circular motion.
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