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Motion
Reference Point
Speed
Average Speed
Velocity
Slope
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Acceleration
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Know how to tell an object is in motion
S = D/T
Average Speed = total distance / total time
Word Problems: Write down formula, show work (WITH UNITS), write answer (WITH UNITS)
If speed unit is km/sec, the distance unit must be km and the time unit must be sec
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A = (final velocity - initial velocity)/time
or
(end speed - start speed) divided by time
occurs when an object speeds up, slows down or changes directions
Units: speed unit/time unit
For a speed vs time graph:
- acceleration is calculated by finding the slope of the line (rise/run)
- average speed is calculated by (start speed + end speed)/2
For a distance vs time graph - when the line is curved there is acceleration
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