Question

a light string wrapped around cylindrical log of wood which is placed on a horizontal surface with its axis vertical and it is pulled with a constant force F as shown in figure. (ignore friction) which of the following is true?
(multiple answers may be true)
(a) Tension in the string increases with increase in angle a
(b) Tension in the string decreases with increase in angle a
(c) Tension T>F if a>(π/3)
(d) Tension T>F if a>(π/4)