Lacey is riding on a roller coaster. It begins by lifting her to 20 meters, then drops 15 meters and goes into a loop with a height of 10 meters. After the loop, it turns sideways and goes into a spiral before it comes to a stop. At which point of the ride did Lacey have the MOST potential energy?
When the roller coaster reached 20 meters before the drop.
Potential energy is energy of position. Lacey has the most potential energy when she is at the highest point on the roller coaster, at 20 meters