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. <br /><br />Step 1: Identify the highest point on the roller coaster. <br /><br />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.<br /><br />Step 2: Determine the point with the maximum potential energy.<br /><br />Since potential energy is highest at the highest point, the roller coaster has the maximum potential energy at point A.<br /><br />So, the answer is A.