PE = mgh
KE = 1/2mv²
I don't get how I'm supposed to find KE without knowing velocity, or without knowing T to find velocity (V = d/t).
EDIT: Yeah, each hill starts and ends at ground level, sorry for not including that.
okay, there is a roller coaster with 2 hills.. this is what I know:
1st hill height: 40m
2nd hill height: 25m
mass of coaster: 500kg
I was asked to find out the PE at top of hill #1, I did that and got 196,000J
Now I have to findthe KE at the bottom of hill #1, as well as finding the...