1. What To Do… Open your manuals to page 23.
Answer the following question in the “Think About It”
When Miss Hinze releases the balloon, what shows you that it is moving?

2. Speed and Velocity Chapter 19 Section 1
Motion
Speed and Velocity
Chapter 19 Section 1
Standard: SPI Apply proper equations to solve basic problems pertaining to distance, time, speed, and velocity

3. Motion & Speed
CLIP
Motion
A change in position in relation to some fixed object.
Fixed objects used to determine relative motion are called reference points.

5. Speed Speed describes how quickly a person or object changes position.
Speed is determined by the following formula:

6. Speed Graphs In what time period is the bass boat speeding up?
In what time period is the bass boat slowing down?
When is the speed NOT changing?

7. Graphing Speed
Speed is usually graphed using a line graph, and it depicts the distance and time.
Time is the independent variable, and thus is ALWAYS on the x-axis.
Distance is the dependent variable, and is ALWAYS on the y-axis.

8. Average Speed
The total distance traveled divided by the time it takes to travel the distance.
Formula:
Instantaneous speed = how fast an object is moving at any given moment.
Constant speed = same speed over time.

9. Let’s Do An Example Together! Show your work!

10. Show your work? What does that mean?!
Write out the formula
Fill in the formula with your information
Solve the formula
Write the answer
Write the proper label
Circle or highlight your answer so it is visible

11. Average Speed
What is the AVERAGE speed of the bass boat depicted in the graph?

12. Average speed is taking the total distance traveled (0 to 125 meters), and dividing by the total time (1 to 9 seconds) it takes.
Average Speed = 125 meters = 13.9 m/s
9 seconds

13. Instantaneous Speed
What is the instantaneous speed of the bass boat at t=7 seconds?

14. Instantaneous speed is speed at any given point in time
Instantaneous speed is speed at any given point in time. At 7 seconds, the distance is 85 meters; therefore we divide to find the speed
Instantaneous Speed = 85 meters = 12.1 m/s
7 seconds

15. Velocity & Acceleration
Velocity = speed in a given direction.
Acceleration = the rate in change of the velocity

16. Acceleration Acceleration is determined by the following formula:
Vf = Final Velocity
Vi = Initial Velocity

17. Circular Motion
Centripetal acceleration occurs as an object traveling in a circular motion is always changing direction and therefore velocity and accelerating.

18. DO!! 933 feet = = 93.3 ft /s 10 seconds 20 meters = = 1.3 m / s
27 km = =
.95 km / min
28.5 minutes
65 miles =
43.3 mph =
1.5 hours

19. Keys to Understanding At LEAST 5 complete sentences
Summarize the main points of the lesson
Describe in detail the important ideas
Write about concepts you want to remember
This should be helpful to YOU!