1. Bell Ringer 1-11-11 What is the formula for speed?
What is an example unit for speed?
Give an example of something that has speed.
What type of graph shows speed?
What does a straight sloped line tell you in a distance-time graph?

2. Chapter 9 Section 2 Speed

3. Objectives ALCOS Objective # 1 ALCOS Objective # 8
Identify steps within the scientific process
Applying process skills to interpret data from graphs.
ALCOS Objective # 8
Identify Newton’s three laws of motion.

4. Speed
The distance traveled by the time it takes to travel the distance is called speed.
The formula for speed is:
Speed = distance or s = d
time t
In SI units, speed is measured in meters per second (m/s).

5. An object in motion can change its speed many times as it moves from one point to another, speeding up or slowing down.

6. Average speed is the total distance traveled divided by the total time taken.
Example:
Total distance = 32 km + 13 km =
Total time = 2 h + 1 h =
Average Speed = 45 km =
3 h

7. An object’s speed at a particular moment, or instant, in time is called instantaneous speed.

8. Constant speed occurs when an object travels at a steady rate with the same speed for a period of time.

9. Velocity
Velocity is the speed of an object in a given direction. (Ex. 30 km/h north)
Velocity changes if either or both of these change (speed or direction).

10. Slope Slope is the steepness of a line on a graph.
It tells you how fast one variable changes in relation to the other variable in the graph.
In other words, the slope tells you the rate of change.

11. Formula
slope = rise
run

14. Vocabulary
Speed
Average Speed
Instantaneous Speed
Velocity
Slope

15. HowStuffWorks Videos "Extreme Engineering: Maglev Train“
HowStuffWorks Videos "Hyperspeed: Risk of Extreme Maglev Speeds"