Percentage of total beginning GPE converted to thermal/kinetic energy

1. Nov 12, 2009

1.
These are calculations for a roller coaster project where we had to find the height, GPE, velocity, KE, and total ME.
Question 1: what percentage of the total beginning GPE was converted to final kinetic energy?

Question 2: What percentage of the total beginning GPE was converted to thermal energy? (and what is thermal energy?)

I just need formulas, thanks.

2. Nov 13, 2009

Delphi51

You can find all the formulas here: http://hyperphysics.phy-astr.gsu.edu/hbase/enecon.html

Thermal energy is heat. Perhaps you have some friction in your coaster so you end up with less mechanical energy than you started with. The loss is in the form of heat.