| A | B |
|---|
| FORCE | a push or a pull one body exerts on another. Unbalanced forces always change the motion of the body. |
| BALANCED FORCES | forces that are equal in size and opposite in direction. |
| NET FORCE | the sum of the forces on an object when unbalanced forces are applied to it. (changes speed/direction/both) |
| INTERIA | tendency of an object to resist change. If at rest wants to stay at rest, if moving wants to keep moving at same speed/direction |
| FRICTION | the force that opposes motion between two surfaces that are touching each other. Depends on kind of force pressing the surfaces together and types of surfaces |
| WEIGHT | the measure of the force of gravity acting on an object. Changes with change in gravity, measured in Newtons. |
| MASS | measurement of the amount of matter in an object |
| GRAVITY | force exerted by every object in the universe on another object. Amount of gravitational pull depends on masses of objects and distance between them. |
