| A | B |
|---|
| a push or pull | force |
| the force of attraction that exists between any pair of objects | gravity |
| force that occurs when one object pushes against another | contact force |
| force that resists motion | friction |
| causes electrically charged objects to either attract or repel | electric force |
| like charges do this | repel |
| opposite charges do this | attract |
| special kind of rock used in the first compass | lodestone |
| every magnet has a __ & __ pole | north & south |
| ability to do work | energy |
| stored energy | potential |
| device that converts a natural form of energy into useful work | engine |
| result of a force moving an object | work |
| when one object gives some or all of its energy to another object | transfer of energy |
| energy of motion | kinetic |
