at the bottom of the highest hill at the top of the highest hill at the start of the track at the end of the track
I gave my students this multiple choice question: A roller coaster is climbing up the highest hill on its track. At which point will the front car of the coaster most likely have its greatest potential energy?

Only one answer is correct among these 4 choices:
- at the bottom of the highest hill
- at the top of the highest hill
- at the start of the track
- at the end of the track

Could you tell me which one is correct?

at the top of the highest hill