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A coin placed on a rotating turntable ju...

A coin placed on a rotating turntable just slips if it is placed at a distance of 4 cm from the centre. If the angular velocity of the turntable is doubled, it will just slip at a distance of

A

2 cm

B

3 cm

C

4 cm

D

5 cm

Text Solution

Verified by Experts

The correct Answer is:
C
for just slip `rArr mu mg =m omega^(2) r`
here `omega` is double then radius is `1//4^(th)`
r'=4 cm
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