A ball on a 0.5 m long cord has a mass of 2 kg and is placed on a low friction surface. The ball is kicked so that it has a velocity of 0.5 m/s and the cord is pulled in at a rate of 0.2 m/s. Neglect friction so that the only important force on the ball is the tension in the cord. Find the tension in the cord when the radius is 0.25 m.