Describing Motion
- Choose an origin and need to find position relative to that origin initially
- need to know position at successive time intervals
- need to know direction of movement
- need to know how fast it's going
- Need a coordinate system
- how far it went
- Is it speeding up or slowing down
- need to know total time and length of time interval
-Need to define all time intervals and physical quantities
-need to include units of distance and time