PowerPoint presentation for our first textbook section that includes information and formulas for speed, velocity, and acceleration.

1. Warm-Up
Aug. 24,2011
Identify at least 3 moving objects that
you can observe from your seat.

2. Reference Points Tour
Object in Motion Reference Point

3. Warm-Up
Aug. 25,2011

4. How could we connect this to moving objects and reference points?

5. Measuring Motion
Chapter 1, Section 1
Determining
Speed

6. Who’s Faster?

7. Who’s Faster?
100 meters
10 seconds
100 meters
15 seconds

8. Who’s Faster?
100 meters
10 seconds
100 meters
15 seconds

9. Who’s Faster?
100 meters
10 seconds
150 meters
10 seconds

10. Who’s Faster?
100 meters
10 seconds
150 meters
10 seconds

11. Who’s Faster?
180 meters
10 seconds
160 meters
8 seconds

12. Who’s Faster?
Speed = distance/time
180 meters
10 seconds = 180m
10 s
160 meters = 160m
8 seconds 8s

13. Who’s Faster?
Speed = distance/time
180 meters
10 seconds = 180m 18 m/s
10 s
160 meters = 160m 20 m/s
8 seconds 8s

14. Speed or Velocity?
Speed –
the rate at which an object moves
how fast an object moves
15 m/s (meters per second)
Velocity –
an object’s speed in a specific direction
how fast AND
which way an object moves
5 m/s north

15. Speed or Velocity?
20 m/s - Speed
17 m/s east - Velocity
100 m/s up – Velocity
0.15 m/s - Speed

16. Formula Triangle
Speed = distance/time
D
S X T

18. Warm-Up
Aug. 26,2011
Fill in the triangle with the formula for speed.
What is the velocity of a car that
traveled 252 miles East in 4 hours?

19. Speed = Distance/Time
D
S T
What is the velocity of a car that
traveled 252 miles E in 4 hours?
Distance 252 mi. = 63 mph E
Time 4 hr.

20. Acceleration
• Acceleration –
The rate at which velocity changes
A change in velocity
(Speed or Direction)
Examples:
Speeding up- A plane taking off
Slowing down- A car stopping at a red light
Changing direction – A car turning at a corner

21. Determining Acceleration
Acceleration = final velocity – initial velocity
time
Vf - Vi
A T

23. Warm-Up
Aug. 29,2011
What two factors determine an
object’s speed?
Distance and Time
Practice Problem:
What is the velocity of a runner traveling
35 meters North in 7 seconds?
Speed = Distance = 35 m = 5 m/s
Time 7s

24. Graphing Velocity

25. Constant Velocity vs. Acceleration