.!.!.

which point has the most PE?
which point has the most KE?
which point has the most TE?
Does the skier lose or gain thermal energy as she skies down the slope? how do you know?

1. Most PE, because PE is directly proportional to distance (height)
Height: 100 meters
Speed: 0 mph

2. Most KE, because KE is directly proportional to speed
Height: 10 meters
Speed: 40 mph

3. Most TE, average KE
Height: 10 meters
Speed: 40 mph

4. The skater gains thermal energy as she goes down the slope, because the speed of the skater increases, so it increases the total kinetic energy of the particles, and makes them vibrate faster, resulting in a higher temperature.

Independent variable is something that is changed in a experiment.