| A | B |
|---|
| Balanced | The condition that exists when two or more forces operating on a body do not change the reast or the motion of that body. |
| Contact Force | Force that must directly touch another object to affect it. |
| Equilibrium | The state that exists when opposing forces are equal. |
| Force | A push or pull that causes something to change its speed or direction. |
| Friction | The force that acts to slow the motion of the things that are moving. |
| Fulcrum | A point or support around which a lever rotates. |
| Gravity | A force that pulls two objects toward each other. |
| Inerita | The tendency of objects to keep doing what they are doing, whether it be moving or staying at rest. |
| Lever | A rigid object that rotates around a fulcrum. |
| Motion | The change in an object's position over time. |
| Newton | A unit of weight in the metric system; one kg-m/sec to the second power. |
| Newton's First Law of Motion | If the forces acting on an object are balanced (equal and opposite), the object will continue doing what it is doing; inertia. |
| Newton's Second Law of Motion | The rate that an object speeds up or slows down depends on the amount of force acting on it and the object's mass. |
| Noncontact Force | A force that does not need two objects to touch to make things change. |
| Normal Force | The force that pushes up to support the weight of an object. |
| Simple Machine | Any device that changes forces or directions of forces. |
| Speed | The measure of the distance an object travels in a specific amount of time. |
| Unbalanced | The condition that exists when tow or more forces operate on a body and change the rest or motion of that body. |
| Work | The result of a force moving an object a certain distance. |
