| A | B |
|---|
| stationary | not moving at all |
| constant speed | type of motion with no acceleration |
| constant acceleration | increasing speed smoothly over time |
| constant deceleration | decreasing speed smoothly over time |
| start and end times | what we should state for a section of a graph |
| push or pull | a force can be thought of as a ... |
| thrust | a type of force (pushing) |
| support force | a surface holds up an object with this |
| lift force | if a woman moves a box upwards, she uses... |
| weight force | the force of gravity on an object |
| mass | how much matter is in an object |
| Newtons | the unit for force |
| metres per second squared | the unit for acceleration (and deceleration) |
| negative acceleration | deceleration |
| metres per second | the unit for speed |
| zero metres per second | a stationary object has a speed of ... |
| zero metres per second squared | objects moving at constant speed have .... |
| net force | overall/total force acting on object |
| opposing forces | what we subtract to get net force |
| opposing | a word that means 'opposite' |
| reversing | moving backwards |
| rate | the amount of something over time |
| velocity | another word for speed |
| friction | surfaces or atoms touching and pushing in opposite directions |
| drag | friction between an object and a fluid (liquid or gas) |
| air resistance | friction between an object and the air |
