| A | B |
|---|
| First Law of Motion | The concept that objects at rest tend to remain at rest and objects in motion tend to stay in motion |
| Second Law of Motion | The concept that an object’s acceleration is related to the strength of the force acting on it and the object’s mass |
| force | A push or a pull |
| friction | The rubbing of one thing against another. The force of friction resists motion between two contacting surfaces |
| inertia | The tendency of matter to remain at rest if at rest, or in motion to remain in motion. |
| newton | A unit used to measure force |
| Isaac Newton | English scientist who stated 3 laws of motion and studied effects of gravity |
| Law of Conservation of Momentum | The principle that momentum can be transferred but cannot be lost |
| action force | The initial force exerted in a pair of forces |
| reaction force | When you push on something it is an action force |
| momentum | The property of moving objects found by multiplying its mass by its velocity |
| Third Law of Motion | States that for every action force there is an equal and opposite reaction force |
| buoyancy | the tendency of things to float in liquids |
| drag | The resistance to forward motion in flight |
| lift | The upward force caused by the difference in air pressure above and below the wings of a plane |
| thrust | The push produced by the engine or propellers of a plane |
