| A | B |
|---|
| force | a push or a pull exerted on an object |
| newton | the unit for force |
| joule | the unit for work |
| work | when a force is exerted on an object and it causes motion |
| unbalanced force | when this acts upon an object the object will move in the direction of the stronger force |
| net force | the net force on an object after all the forces are added together |
| balanced force | equal forces acting on an object from opposite directions |
| motion | the state in which the distance from one object to another is changing |
| friction | the force that one surface exerts on another when the two rub together |
| traction | the friction between an object and the surface on which it moves |
| weight | the force with which gravity is pulling down on an object |
