1. Motion Mr. Skirbst Physical Science Topic 03

2. What is motion?

3. motion is a change in position over a period of time

4. Frame of reference

5. Object or background with which movement is compared

6. SPEED:

7. rate at which an object moves

8. SPEED: rate at which an object moves S = d / t S = speed; d = distance; t = time

9. SPEED: rate at which an object moves S = d / t S = speed; d = distance; t = time Constant speed – does NOT change over time Average speed = TOTAL distance / TOTAL time

10. Example: If an object moves 100 km in 5 hrs, what is its speed?

11. VELOCITY

12. speed in a given direction Ex. 10 km/hr east

13. ACCELERATION

14. Rate of change in velocity

15. ACCELERATION Rate of change in velocity A = ( V f – V o ) / t A = acceleration V f = final velocity V o = original velocity T = time

16. Example: A car is able to reach 100 km/hr (east) in 5 seconds from a starting line. What is its acceleration?

17. MOMENTUM

18. how difficult it is to start or stop an object

19. MOMENTUM how difficult it is to start or stop an object M = (m) (v) M = momentum m = mass v = velocity

20. Example: A truck has a mass of 10,000 kg and is moving at a velocity of 100 km/hr. What is its momemntum?