The correct answer is:
A. the pendulum ball is at its highest points away from a surface.
Explanation:
the potential energy of an object is given by
[tex] U=mgh [/tex]
where m is the mass of the object, g is the gravitational acceleration, and h is the height of the object from the ground. Looking at the formula, we see that the potential energy is higher when h is higher, therefore when the pendulum ball is at the highest point away from the surface.
