| A | B |
|---|
| force | a push or a pull |
| inertia | tendency to resists a change in motion |
| average speed | rate of motion calculated by dividing distance traveledby time traveled |
| work | is done when applied force causes an object to move in the direction of the force |
| velocity | speed of an object and it's direction of motion |
| acceleration | change in velocity divided by the amount of time needed for the change to occur |
| instantaneous speed | speed of an object at any given time |
| compound machine | a combination of simple machines |
| inclined plane | a sloped surface; sometimes called a ramp |
| friction | motion between two touching surfaces and always acts opposite to the direction of the motion |
| pulley | an object with a groove, like a wheel, with a rope or chain running through the groove |
| lever | a rod or plank that pivots about a point |
| simple machine | device that makes work easier with only one movement |
| mechanical advantagge | number of times a machinemultiples the effort force you apply to it |
