A coin placed on a rotating turn table j...

A coin placed on a rotating turn table just slips if it is placed at a distance of 8 cm from the centre. If angular velocity of the turn table is doubled . It will just slip at a distance of

1 cm

2 cm

4 cm

8 cm

Text Solution

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The correct Answer is:

We know , F `mromega^2" "ar " "l" "romega^2="constant"``omega^2prop1/rrArr(omega^2/omega^1)^2=r_1/r_2rArr(4omega_1^2)/(omega_1^2)=8/r_2`
so ,`r_2=2cm`

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