A small body of mass m tied to a non-stretchable thread moves over a smooth horizontal plane. The other end of the thread is being drawn into a hole O(figure) with a constant velocity. Find the thread tension as a function of the distance r between the body and the hole if at `r=r_0` the angular velocity of the thread is equal to `omega_0`.

Answer

`[(momega_(0)^(2)r_(0)^(4))/(r^(3))]`