Question

A coin placed on a rotating turntable just slips if it is placed at a distance of 16 cm from the
centre. If the angular velocity of the turntable is doubled, it will just slip at a distance (in cm) of
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Answer 1

Answer:

It will slip at a distance of 4 cm. When angular velocity is doubled, centrifugal force becomes four times because centrifugal force is proportional to square of angular velocity. To keep the centrifugal force same on the coin, the radial distance will have to be reduced to 1/4 of original distance i.e 1/4 x 16 = 4 cm.

Answer 2

Explanation:

It will slip at a distance of 4 cm. When angular velocity is doubled, centrifugal force becomes four times because centrifugal force is proportional to square of angular velocity. To keep the centrifugal force same on the coin, the radial distance will have to be reduced to 1/4 of original distance i.e 1/4 x 16 = 4 cm.