A ring rolls without slipping on the ground. Its centre `C` moves with a constant speed `u.P` is any point on the ring. The speed of `P` with respect to the ground is `v`.
A. `0levle2u`
B. v=u, if CP is horizontal.
C. v=u, if CP makes an angle of `60^(@)` with the horizontal and P is below the horiozontal level of C.
D. `v=sqrt(2)u`, if CP is horizontal