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 c
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
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Correct Answer - 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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