15. If friction was completely removed from the track, what affect would this have on the roller coaster ride? A. Without friction, the roller coaster ride would last forever!

B. The coaster would eventually stop because the coaster would still lose energy.

C. The coaster would use hills and flat sections to stop instead.

A

Explanation:
The coaster wouldn’t eventually stop because there’s no fiction to stop it. In order for a object to stop, there must be a opposing force ( in this case, fiction).
It is true that the coaster could use hills to stop, but the coaster can’t use flat section to stop.
So what I think is that the answer is A.

Fun Fact:
It would be really tough just to stand up without friction.

I hope this help and have a nice day :)