To find the angle theta between the string and the vertical for a mass suspended and revolving in a horizontal circle, the mass m is 3.5 kg, the string length L is 1.47 m, and the tangential speed is 3.44 m/s. Using the centripetal force equation Fc = mv²/r, the calculated angle theta is approximately 35 degrees from the vertical. The discussion emphasizes the application of trigonometry and centripetal force principles to solve the problem. Further clarification or alternative solutions may be sought by participants. The calculations suggest a practical understanding of physics concepts in circular motion.