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Phy. 011
Chapter 1
| Term | Definition |
|---|---|
| FREQUENCY | # of events per a given amount of time |
| PERIODIC | an event that happens repeatedly |
| PERIOD | amount of time between each event |
| FREQUENCY (symbol) | f (italic) |
| PERIOD (symbol) | T |
| Relation between FREQUENCY & PERIOD | period=1/frequency or T=1/f |
| UNIT of frequency | Hertz (Hz) = 1 cycle per second |
| SPEED | rate of change of distance from a reference point - rate of movement = d (final) - d (initial)= df - di / t (final) - t (initial)= tf - ti = change in D / change in T |
| what does SPEED equal to? | the distance something travels/ total time traveled |
| AVERAGE SPEED | = total distance/ total elapsed time |
| TOTAL DISTANCE | = d (final) - d (initial)= df - di |
| TOTAL ELAPSED TIME | = t (final) - t (initial)= tf - ti |
| SPEED (symbol) | v (italic) |
| DISTANCE traveled | d= v(average speed, m/s)*t (time traveled, s) |
| VELOCITY | speed in a particular direction (how fast in what direction) ex. wind blowing 15 mph from the west (speed of wind blowing from the west to the east) |
| ACCELERATION | the change in velocity/ elapsed time |
| ACCELERATION (symbol + units) | a= L/T divided by T= L/ T x T = L/ T^2 ex: SI units=m/s^2 cars= mph/s |
| how is ACCELERATION EXPRESSED? | in terms of g's - one g= 9.8m/s^2 |
| Define CENTRIPETAL ACCELERATION | acceleration associated w/ an object moving in a circular motion |
| CENTRIPETAL ACCELERATION (equation) | a= v^2/r |
Created by:
CandaceL
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