A small ball is fastened to a string 24 cm long and suspended from a fixed point P to make a conical pendulum, as shown in the figure below. The ball describes a horizontal circle about a center vertically under point P, and the string makes an angle of 15o with the vertical. Find the speed of the ball.

A small ball is fastened to a string 24 cm long and suspended from a fixed point P to make a conical pendulum, as shown in the figure below. The ball describes a horizontal circle about a center vertically under point P, and the string makes an angle of 15o with the vertical. Find the speed of the ball.