An ice cube slides around a vertical circular path of diameter d. at the top of the circular path, the ice cube is moving at a speed of vt . (a) what is the speed of the ice cube at the bottom of the circular path in terms of given parameters and constants of the universe? (b) find an expression for the ice cube’s speed when it is at an angle θ, where the angle θ is measured counterclockwise from the top of the circular path.