2. PHYSICS LAB

3. LAB #3 INTRODUCTION TO INTERACTIVE PHYSICS

4. GOALS 1 TO LEARN TO CREATE MECHANICAL SIMULATIONS AND TAKE MEASUREMENTS 2 TO DISCOVER THE FACTORS WHICH DETERMINE THE STOPPING DISTANCE (D) OF A CAR. –D VS INITIAL SPEED (Vo) –D VS MASS (m) –D VS GRAVITY (g)

5. SKETCH m Vo D m Vf = 0

6. Vo Vf = 0 D LAB #3: I.P. SIMULATION Use ruler to measure D

7. PROCEDURE PART A: D vs Vo –CREATE A MASS ON AN ANCHORED PLATFORM –CHANGE THE Vo OF THE MASS FOR ATLEAST 6 TRIALS –MEASURE THE STOPPING DISTANCE FOR EACH TRIAL

8. PROCEDURE PART B: D vs MASS (m) –USE THE SAME SIMULATION –KEEP Vo CONSTANT –CHANGE MASS- 6 TRIALS –MEASURE D FOR EACH TRIAL

9. PROCEDURE PART C: D vs GRAVITY (g) –USE THE SAME SIMULATION –KEEP Vo & MASS CONSTANT –CHANGE g TO EACH PLANET –MEASURE D FOR EACH TRIAL

10. DATA TABLE A: d vs Vo ???? Constants:

11. GRAPH #1: D vs Vo INITIAL VELOCITY (m/s) STOPPING DISTANCE (m)

12. Vo 2 (m 2 /s 2 ) GRAPH #2: D vs ?V? STOPPING DISTANCE (m) V something?

13. RECALL: Lab #1: Area vs Radius RADIUS AREA RADIUS ^2 A  R 2 AREA

14. DATA TABLE B: d vs m Constants:

15. GRAPH #3: D vs mass MASS (kg) STOPPING DISTANCE (m)

16. DATA TABLE C: d vs g ???? Constants:

17. GRAPH #4: D vs g GRAVITY(g) (N/kg) STOPPING DISTANCE (m)

18. GRAPH #5: D vs g? INVERSE GRAVITY (kg/N) STOPPING DISTANCE (m) g Something?

19. WRITE-UP ABSTRACT: –BACKGROUND –METHOD SCREEN DUMP OF IP SIM DATA TABLES GRAPHS –TRENDLINES –GRAPH ANALYSIS CONCLUSION

20. LAB #3 DATA ANALYSIS

21. GRAPH #1: D vs Vo INITIAL VELOCITY (m/s) STOPPING DISTANCE (m) D  V n n = 2,3,?

22. Vo 2 (m 2 /s 2 ) GRAPH #2: D vs ?V? STOPPING DISTANCE (m) D  Vo 2

23. Cookie Law 2r r A  r 2 4 x more cookie!! How much more cookie?

24. GRAPH #3: D vs mass MASS (kg) STOPPING DISTANCE (m) D independent of mass

25. GRAPH #4: D vs g GRAVITY(g) (N/kg) STOPPING DISTANCE (m) D  1/g n n = 1,2,?

26. GRAPH #5: D vs g? INVERSE GRAVITY (kg/N) STOPPING DISTANCE (m) D  1/g