Posted by Anna on .
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #5:
A roller coaster car starts at Point A at a height of 100 m. When it reaches Point C on a lter hill, it is moving 15 m/s. What is its height at Point C assuming no friction? (88.5 m)

PHYSICS 
Elena,
mgh₁mgh₂=mv²/2
h₂=h₁v²/2