1. Motion
Terms and Symbols

2. Frame of reference – the context by which we observe objects (reference point)
Reference point- the object that appears to stay in place or an arbitrary point on an object used to establish position
Example: sitting on the beach watching a boat go by. The boat is moving relative to your position on the beach

3. motion Position – an object’s location
Motion – the act of changing position
Distance - measure of how far an object moves in relation to a reference point; the amount of change in position

4. xf – final position x – position xi – initial position SYMBOLS
- delta – means change
d – distance
x – position
x – change in position
xi – initial position
xf – final position

5. Displacement Time Interval
a measure of how far an object moves in a certain direction
(for example: 140 km west)
Time Interval
how long it takes for something to happen.

6. Speed Velocity the distance an object travels in a unit of time.
The symbols for speed:
v for velocity
r for rate
s for speed
The unit of speed is distance per unit of time.
For example: 50 km/h or 5 m/s
Velocity
A measure of an object’s speed in a certain direction
for example: 50 km/h west or 5 m/s west

7. Acceleration-
the rate at which velocity changes over time

8. Add to Equation Chart d= Xf – Xi *** add to separate box
Equation for distance when initial and final positions are known.
d= Xf – Xi
*** add to separate box
Equation for distance when speed and time are known.
d = s(t)

9. Add to equation chart
Equation for speed when distance and time are known.
∆s= d/t

10. add to chart
Equation for time when speed and distance are known.
∆t = d/s