| A | B |
|---|
| Weight | a force that comes from gravity pulling down on any object with mass |
| Pound | the English unit of force equal to 4.448 Newtons |
| Newton | the metric unit of force, equal to the force needed to make a 1 kg object accelerate at 1 m/s squared |
| Tension | a pulling force that acts in a rope, string, or other object |
| Compression | a squeezing force that can act on a spring |
| Friction | a force that resists motion |
| Sliding Friction | the friction force that resists motion of an object moving across a surface |
| Static Friction | the friction force that resists the motion between two surfaces that are not moving |
| Net Force | the sum of all forces acting on an object |
| Balanced Forces | combined forces that result in a sero net force on an object |
| Equilibrium | the state in which the net force on an object is zero |
| Normal Force | the force that a surface exerts on an object that is pressing on it |
| Free-body Diagram | a diagram showing all the forces acting on an object |
