A ring of radius r is moving without slipping on a circular track of radius R speed of the centre of the ring is `v = omega r`. Ignoring the fact that the ring axis is inclined

Options

A. The radial acceleration of centre of the ring is `(omega^(2)r^(2))/(R )`
B. The radial acceleration of centre of the ring is `(R-r)^(2)/(R )omega^(2)`
C. The angular velocity of centre of the ring about vertical axis passing through the centre of track is `romega//R`.
D. The angular velocity of centre of the ring about vertical axis passing through the centre of track is `((R-r))/(R )omega`

Answer

A, C

Explanation

velocity of centre of ring is = `romega`