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A coin placed on a rotating table just s...

A coin placed on a rotating table just slip when it is placed at a distance 4 r from the centre, on doubling the angular velocity of the table , the coin will just slip now the coin is at a distance from centre is

A

4 r

B

`r//4`

C

r

D

2 r

Text Solution

Verified by Experts

The correct Answer is:
C
`r_(2) onega_(1)^(2)`
`r_(2)=(r_(1) omega_(1)^(2))/(omega_(2)^(2))=(4r_(1) omega_(1)^(2))/(4 omega_(1)^(2)`
`r_(2)=r`
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