1. Matter in Motion

2. Measuring Motion  An objects change in position or location in a given time relative to a reference point.

3.  A stationary location or object used to determine whether or not an object moved. AT that given time.

4. Examples of References Points  Trees  Mountain  Buildings  Planted gardens  Fire hydrant  Rock  Light post  Street name

5. Speed

6. Speed  The distance traveled by an object divided by the time traveled.  Unit of measurement: m/s

7. equations

8. Let’s Calculate Speed  1.) Kira jogs to a store 72m away in a time of 36 s. What was Kira’s average speed? STEP 1: Write the equation for average speed Average speed: total distance total time total time

9. Let’s Calculate Speed  If you travel 7.5 m and walk for 1.5h what was your average speed?  STEP 1: Write the equation for average speed Average speed: total distance total time total time

10. Velocity

11. Velocity  The speed of an object in a particular direction.  Unit of measurement: m/s(direction)

12. Diagrams of velocity

13. Two factors that change velocity:  1.) The Speed changes.  2.) The Direction changes.

14. Acceleration  The rate at which velocity changes. (how quickly velocity is changing)  Unit of measurement: m/s 2 (direction)  Example: an object accelerates if its speed, its direction or both change.

15. Calculating Acceleration  Average Acceleration: final velocity-starting velocity time it takes to change velocity

16. 2 Ways to have zero velocity   a) Remain at Rest   Constant Velocity

17. Circular motion   Velocity is changing so acceleration is changing.   You are constantly changing your direction.

18. Centripetal Acceleration   The acceleration occurs in a circular motion.

19. Examples   Ferris Wheel   Moon orbiting the Earth