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Phy Sci Motion Ch
1D motion overview
| Question | Answer |
|---|---|
| distance divided by time | speed |
| set of guidelines for describing an object's position | frame of reference |
| quantity that has magnitude and direction | vector quantity |
| change in position | motion |
| displacement divided by time | velocity |
| quantity that has magnitude only | scalar quantity |
| change in velocity divided by time | acceleration |
| slowing down in (+) direction or speeding up in (--) direction | negative acceleration |
| the shortest difference between starting point and ending point | displacement |
| velocity and displacement if object returns to where it started | zero |
| positive directions | north and east |
| negative directions | south and west |
| speed up , slow down, change direction | 3 ways to be accelerating |
| don't move or change velocity | 2 ways to have zero acceleration |
| SI unit for time | seconds |
| SI unit for distance (length) | meters |