Question

where does the swing have the least potential energy? point b point a point c

Explanation:

Step1: Recall potential - energy formula

The gravitational potential energy formula is $U = mgh$, where $m$ is mass, $g$ is the acceleration due to gravity, and $h$ is the height. For a swing, the lower the height $h$, the less potential energy.

Step2: Analyze points

Assume the lowest - height point among the given points has the least potential energy. Without a visual of the relative heights of points A, B, and C, if we assume the lowest point is the one with the least potential energy, and if we consider the general principle that potential energy is minimum at the lowest position of the swing's motion.

Answer:

The point with the lowest height among Point A, Point B, and Point C has the least potential energy. Since no information about the heights of these points is given in the text itself, we cannot definitively choose A, B, or C. But conceptually, it is the lowest - height point.