Consider a situation where you swing a ball connected to a string in a circle. How does the tension in the string vary as the ball moves across different points in its circular path, and what forces are involved?

As the ball swings in a circular motion, the tension in the string varies. It is maximum at the lowest point of the swing due to the combination of gravitational force and the required centripetal force. At the highest point, the tension is lower because gravity partially contributes to the required centripetal force. The forces involved include tension, gravity, and centripetal force.