A tether ball of mass m is suspended by a rope of length L from the top of a pole. A youngster gives it a whack so that it moves with some speed v in a circle of radius r = L sin(θ) < L around the pole. a) Find an expression for the tension T in the rope as a function of m, g, and θ. b) Find an expression for the speed v of the ball as a function of θ. F = mv^2 / r I do not know what to do. All I have is Tcosx = mv^2/r - mg any help please??