| Term | Definition |
|---|
| friction | general term for the force that one surface exerts on another when they rub against each other |
| rolling friction | the kind of friction that results when a wheel turns on a surface |
| sliding friction | the kind of friction that results when you rub sandpaper against wood |
| fluid friction | the kind of friction that exists between oil and a door hinge |
| free fall | a falling object reaches this when the forces of gravity and air resistance are balanced |
| gravity | the measure of the force of gravity on an objects |
| terminal velocity | terminal velocity |
| air resistance | the force that affects the way an object falls |
| weight | the amount of gravity on an object |
| inertia | the tendency to an object to resist any change in its motion |
| force | a push or a pull usually with a direction |
| unbalanced forces | a force that can cause an object to start moving, stop moving or change direction |
| balanced forces | equal forces acitng on an object in opposite directions |
| net force | the overall force acting on an object is found by adding the forces together |
| mass | the size and shape of an object; the amount of space an object occupies |
| momentum | the mass multiplied by the velocity of an object |
| Newton | the scientist who theorized three laws of motion |
| acceleration | acceleration |
| newton | the force needed to move an object a distance in an amount of time |
| law of conservation of momentum | objects in an interaction is the same before and after the interaction in the absence of friction |
Combine with other sets
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