Chapter 9.3 Review (7th)

Match it! Select the correct answer from the pull down...Good luck!

A force that opposes motion between two surfaces that are touching

Whenever one form of energy is converted into another, some of the original energy is always converted into which type of energy?

this is a comparison of the amount of energy before a conversion with the amount after

Whenever one form of energy is converted into another, some of the original energy is always converted into which type of energy?

When a roller coaster moves, what helps to overcome friction?

The total amount of ______________________________ in a closed system is always the same.

When there is friction on a roller coaster, some of the potential energy is not converted into

What is a perpetual motion machine?