| A | B |
|---|
| force | a push or a pull |
| net force | the overall force on an object after all forces are added together |
| inertia | the tendency of an object to resist change in its motion |
| mass | the amount of matter in an object |
| one newton | the force required to accelerate 1 kilogram of mass at 1 meter per second per second |
| friction | the force that one surface exerts on another when the two rub against each other |
| sliding friction | the kind of friction that occurs when solid surfaces slide over each other |
| fluid friction | the friction that occurs when an object moves through a fluid |
| gravity | the force that pulls objects toward Earth |
| free fall | When the only force acting on a falling object is gravity, the object is said to be in __ __. |
| air resistance | objects falling through air experience this type of fluid friction |
| weight | the force of gravity on a person or object at the surface of a planet |
| momentum | the product of an objects mass and velocity (mass X velocity) |
| satellite | any object that travels around another object in space |
| velocity | speed in a given direction |
| terminal velocity | the greatest velocity an object can achieve |
| centripetal force | force that causes an object to move in a circle |
| balanced forces | equal forces acting on objects in opposite directions |
| unbalanced forces | forces which produce a nonzero net force and so will cause motion |
