| A | B |
|---|
| Acceleration | change in an object’s motion; caused by unbalanced forces |
| Balanced force | equal and opposite forces on an object that result in no change in position, direction, or motion; net force equals zero |
| Inertia | tendency of an object to resist change in motion |
| Law of action-reaction | for every action, there is an equal and opposite reaction |
| Law of force and acceleration | when an object that has a constant mass is acted upon by a force, the object will accelerate in the same direction as the force applied |
| Law of inertia | the tendency of an object to resist change in motion unless acted upon by a force |
| Net force | measurement of the total forces exerted on an object |
| Speed | distance traveled by an object in a given amount of time |
| Unbalanced force | unequal forces on an object that may result in a change in position, direction or motion; net force does not equal zero |
| Velocity | a measurement of an object's speed and direction |
