| A | B |
|---|
| Newton | unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second |
| Newton's 1st law | continues in an existing state of rest or continual motion in the same direction until acted on be external force |
| inertia | object's resistance to change in motion |
| force | a push or pull exerted on an object |
| Newton's 2nd law | sum of the forces is equal to mass of the object multiplied by the object's acceleration |
| Newton's 3rd law | forces act in pairs and for every action there is an equal and opposite reaction |
| friction | the resistance to motion that occurs when an object encounters when moving over a surface |
| gravity | force the pulls objects toward eachother |
| motion | the state at which an object's distance from position is changing |
| action force | force exerted by first object on the second object |
| reaction force | force exerted by second object in response to first object |
| drag | force that acts in the opposite direction as object moving through air |
| centripetal force | force that acts on an object in a circular path and is directed to the center |
| Newton's 3rd law | as fuel in the rocket ignites, the force of gas expansion and explosion pushes out the back of the rocket and send the rocket skyward |
| Newton's 2nd law | as ice skater pushes harder with his leg muscles, he begins to move faster |
| Newton's 1st law | when you are standing up in a subway train, and the train suddenly stops, your body continues to go forward |
| friction | the blade of an ice skate skimming over the ice results in the production of heat energy causing the ice to melt |
| air resistance | sleek shape of bobsled allows greater speeds because of decrease in ____________ |
| impulse | F x t |
| N * s | units for impulse |
| impulse | change of momentum of an object when the object is acted upon by a force for an interval of time |
| air resistance | force that is caused by air. The force acts in the opposite direction to an object moving through the air. |
