| A | B |
|---|
| speed | rate of change of an object's position |
| displacement | measures the change in position of an object, using the starting point and ending point noticing the direction |
| velocity | rate of change of displacement; includes both speed and displacement |
| acceleration | rate of change of velocity |
| mass | quantity of matter in an object and a measure of the object's inertia |
| inertia | measures an object's tendency to remain at rest or stay in motion |
| momentum | product of mass and velocity |
| law of conservation of momentum | states that energy cannot be created or destroyed |
| force | push or pull exerted on an object |
| net force | sum of the forces acting on an object |
| balanced forces | two or more forces acting on an object that cancel each other out |
| unbalanced forces | two or more unequal forces acting on an object that causes acceleration |
| Newton's first law of motion | an object at rest or moving at a constant speed in a straight line continues until a force acts on it |
| friction | rubbing force that acts against motion between two touching surfaces |
| Newton's second law of motion | an object acted on by a force will accelerate in the direction of this force |
| normal force | outward force a surface supplies to support an object |
| Newton's third law of motion | forces always act in equal and opposite pairs |
