Question

At what point does a roller coaster have the most kinetic energy?
GPT 3.5
A roller coaster has the most kinetic energy at the bottom of its tallest hill, just before it starts to ascend again. This is because the roller coaster is at its highest speed at that point, and kinetic energy is directly proportional to an object's speed. As the roller coaster ascends the hill, it loses speed and therefore its kinetic energy decreases.