1. Chapter Warm - Up
1. What is the difference between distance and displacement?
2. What is the difference between speed and velocity?
3. Circular motion may have the same _________ but not the same _______.
4. Give an example of resultant velocities.

2. Chapter
Acceleration

3. Acceleration Acceleration: Rate at which velocity changes.
Acceleration can be a change in motion
Acceleration can be a change in direction

4. Deceleration
Deceleration – Negative acceleration

5. Centripetal Acceleration
Centripetal Acceleration – No change in speed, but constantly changing direction

7. Calculating Acceleration:
Acceleration= Final Velocity – Initial Velocity
Time
Unit of Measurement – m/s² - Meters per second squared
Acceleration on a velocity-time graph
See pg 329 in Text

11. Positive Acceleration Example
Suppose a jet airliner starts at rest at the end of a runway and reaches a speed of 80 m/s in 20 s. What is the acceleration?

12. Airplane Example

13. Acceleration Example #2
Find the average acceleration of a northbound train that slows down from 12 m/s to 9.6 m/s in 0.8 s.

14. More Practice…
1. Natalie accelerates her skateboard along a straight path from 0 m/s to 4.0 m/s in 2.5 s. Find her average acceleration.
2. A turtle swimming in a straight line towards shore has a speed of 0.50 m/s. After 4.0 s, its speed is m/s. What is the turtle’s average acceleration