| Question | Answer |
| speed equation | distance divided by time |
| speed | the rate at which an object moves |
| motion | a change in postion in a certain amount of time |
| average speed | speed that changes over time |
| constant speed | speed that does not change over time |
| velocity | speed in a given direction |
| acceleration | rate of change in velocity |
| deceleration | a decrease in velocity |
| momentum | depends on the mass of the object and the velocity with which it is traveling |
| acceleration equation | (final velocity-orginal velocity)divided by time |
| momentum | mass x velocity |
| average speed | final distance divided by final time |
| Types of Friction | Rolling, Fluid, Sliding |
| Rolling Friction | Produced by such objects such as wheels or ball bearings. Tends to be less than sliding friction. |
| Sliding Friction | When solid objects slide over each other |
| Balanced Force | force acting on an object that will NOT change the object's motion |
| Unbalanced Force | force that acts on an object that will change its direction |
| Force | A force gives energy to an object, sometimes causing it to start moving, stop mofing or change direction. A push or a pull |
| Friction | A force that acts in a direction opposite to the motion of the moving object. Friction will cause a moving object to slow down or stop. |
| Fluid Friction | Occurs when objects move accross or through fluids or gases |
| Sir Isaac Newton | Laws of motion |
| 1st law | Inertia - an object a rest remains at rest and an object in motion remains in motion unless acted upon by an unbalanced force. |
| 2nd Law | Force = mass x acceleration (the larger the force the larger the acceleration) |
| 3rd Law | Every action has an equal and opposite reaction. |