A smooth ring of mass m can slide on a fixed horizontal rod. A string tied to the ring passes over a fixed pulley B and carries a block C of mass 2m as shown below. At the instant ring and the block just starts sliding

Options

A. The relation between magnitudes of accelerations of A and C is `a_C = a_A cos theta`
B. The The relation between magnitudes ofacceleration of A and c is `a_A = a_C cos theta`
C. The acceleration of the block is - `(2 g cos^2theta)/(1+2 cos^2theta)`
D. The tension in the string is `T = ma_A sec theta`

Answer

A, C, D