| A | B |
|---|
| speed | the rate of change in motion |
| acceleration | the rate of change in velocity |
| Newton's 1st Law of Motion | Known as the law of inertia |
| air resistance | the force that air exerts on falling objects |
| balanced force | when two opposing forces are equal in size |
| Newton's 2nd Law of Motion | F = ma |
| velocity | both speed and direction |
| newton | unit for force |
| Law of Conservation of Momentum | momentum cannot be created or destroyed |
| work | the transfer of energy through motion |
| fluid | anything that flows |
| conduction | transfer of thermal energy by direct contact of particles |
| mechanical energy | total of kinetic and potential energy in a system |
| thermal energy | total energy of a material's particles |
| constant speed | speed that does not vary |
| inertia | the tendency of an object to resist change in motion |
| weight | the force of gravity acting on an object |
| force | a push or pull one body exerts on another |
| Newton's 3rd Law of Motion | for every action there is an equal and opposite reation |
| gravity | 9.81 m/s squared |
| net force | changes the speed, direction, or both of an object |
| friction | force the opposes motion between two surfaces that are touching each other |
| energy | the ability to do work |
| temperature | the measure of the average kinetic energy |
| radiation | the transfer of energy in the form of waves |
| convection | the transfer of energy by bulk movement of particles |
| specific heat | the amount of energy required to raise a 1kg object by 1 C |
| potential energy | stored energy |
| kinetic energy | energy in the form of motion |
| joule | unit for energy |
| insulator | does not allow heat to travel through it easily |
| Law of Conservation of Energy | energy cannot be created or destroyed |
