1.  “Speed and Velocity”

2.  Key Questions How do you calculate speed? How can you describe changes in velocity? How can you interpret graphs of distance versus time.

3. speed- average speed- instantaneous speed- velocity- slope- Key Terms

4. Paragraph 1 rate: amount of change of something over time; speed: rate of how fast over a certain time + distance; speed formula: speed = distance / time; use algebra if you know 2 of the 3 variables. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

5. Paragraph 2 moving object: constant speed maintains a certain speed; however most object’s speed varies; average speed: divide total distance traveled by total time; instantaneous speed: rate of speed at any given moment; but speed does not tell distance by itself; velocity: measure of speed in a given direction; changes in velocity come from changes in speed, direction or both. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

6. Paragraph 3 a graph can show motion when you plot: distance versus time on a line graph; slope of a distance (y-axis) vs time (x-axis) graph shows speed; a straight line represents motion at a constant speed; steepness of the line’s slope depends on the object’s speed; a horizontal line represents a motionless object. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org

7. Paragraph 4 slope is dividing the rise by the run; rise: vertical difference between any 2 points on a line; run: horizontal distance between the same two points; Slope = Rise / Run. 1.511 × 511 - en.wikipedia.org511 × 511 - en.wikipedia.org