In her hand a softball pitcher swings a ball of mass 0. 250 kg around a vertical circular path of radius 60. 0 cm before releasing it from her hand. The pitcher maintains a component of force on the ball of constant magnitude 30. 0 n in the direction of motion around the complete path. The speed of the ball at the top of the circle is 15. 0 m/s. If she releases the ball at the bottom of the circle, what is its speed upon release?.