Which letter shows the ball when it has the maximum potential energy? G D A

The potential energy of an object is determined by its height from the ground. The higher the object is, the greater its potential energy. Step 1: Identify the highest point on the roller coaster. From the description, the roller coaster starts moving downwards from point A, which suggests that point A is the highest point on the roller coaster.Step 2: Determine the point with the maximum potential energy.Since potential energy is highest at the highest point, the roller coaster has the maximum potential energy at point A.So, the answer is A.