| A | B |
|---|
| Friction | force that opposes motion between two touching surfaces |
| Force | a push or a pull |
| Balenced forces | two forces equal in size but opposite in direction |
| Unbalenced forces | forces that are unequal in size |
| Inertia | tendency of an object to resist a change in motion |
| Net Force | total resulting force |
| Gravity | force of attraction between the Earth and other objects |
| Air resistance | the force air pressure exerts on an object |
| Newton's 1st Law (example) | A soccer ball sits on the grass - it doesn not move because no force acts on it. |
| Newton's 2nd Law (example) | it takes a force of 10.0N to accelerate a 5.0kg mass to 2.0m/s/s |
| Newton's 3rd Law (example) | A rocket takes off. |
| Newton's 1st Law (define) | resistance to change in motion |
| Newton's 2nd Law (formula) | mass times acceleration |
| Newton | standard unit of force |
| pressure | weight or foece per unit area |
| bouyancy | the upward force of water |
| weight | force due to gravity |
| Reaction force | a force that occures with every action force |
| Mass | is a measure of inertia |
| Third Law (example) | a firehose throwing a firefighter backwards after being turned on |
