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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 |