Difference between revisions of "Forest PHYS100 Chapt2"
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:<math>\bar s = \frac{d}{t}</math> | :<math>\bar s = \frac{d}{t}</math> | ||
| + | The bar over the <math>s</math> just used to indicate that it is an average. | ||
| + | |||
| + | ==An example of calculating your average speed== | ||
| + | |||
| + | Suppose you drive from Pocatello to a friends house in Salt Lake. You know that the distance is 150 miles. | ||
| + | |||
| + | If it takes you 3 hours to drive there then your average speed is | ||
| + | |||
| + | :<math>\bar s = \frac{150 \mbox{miles}}{3 \mbox{hours}}</math> | ||
==Instantaneous speed== | ==Instantaneous speed== | ||
Revision as of 15:14, 30 August 2014
Chapt 2 Motion
Newton's Principia published in 1687 ( in latin and then 1726 in english).
Average speed
Average speed is the ratio of the DISTANCE you have traveled divided by the time it took you to travel that distance.
We can write a formula to express the definition of speed using the above abreviations for speed, distance, and time
The bar over the just used to indicate that it is an average.
An example of calculating your average speed
Suppose you drive from Pocatello to a friends house in Salt Lake. You know that the distance is 150 miles.
If it takes you 3 hours to drive there then your average speed is
Instantaneous speed
Speed at a given instant in time.