1. NATURAL LAWS AND CAR CONTROL
CHAPTER 5
NATURAL LAWS AND CAR CONTROL

2. NATURAL LAWS AND CAR CONTROL
CHAPTER 5
NATURAL LAWS AND CAR CONTROL
5.1 GRAVITY AND ENERGY OF MOTION
5.2 FRICTION AND TRACTION
5.3 STOPPING DISTANCE
5.4 CONTROLLING FORCE OF IMPACT

3. GRAVITY : THE FORCE THAT PULLS ALL THINGS TO EARTH

4. DRIVING UPHILL:
LOSE SPEED
INCREASE POWER TO OVERCOME GRAVITY

5. DRIVING DOWNHILL:
GRAVITY INCREASES SPEED
TAKES LONGER TO STOP
SHIFT TO A LOWER GEAR TO HAVE ENGINE HELP SLOW VEHICLE

6. CENETR OF GRAVITY: THE POINT AROUND WHICH AN OBJECTS WEIGHT IS EVENLY DISTRIBUTED.

7. LOW CENTER OF GRAVITY=MORE STABLE

8. High Center of Gravity = Less Stable!

9. THE FORCE THAT CAUSES OBJECTS TO MOVE.
ENERGY OF MOTION
A.K.A. Kinetic energy
THE FORCE THAT CAUSES OBJECTS TO MOVE.

10. Weight
WEIGHT:
ENERGY OF MOTION DOUBLES WHEN AN OBJECTS WEIGHT IS DOUBLED.
WHEN IT WEIGHS TWICE AS MUCH IT NEEDS TWICE THE DISTANCE TO STOP

11. CHAPTER 5
SPEED:
A CAR’S ENERGY OF MOTION WILL CHANGE IN PROPORTION TO THE SQUARE OF IT’S CHANGE IN SPEED.
EXAMPLE: SPEED GOES FROM MPH (IT HAS MULTIPLIED 2X)
2 SQUARED IS 4 SO…………..
IT WILL NEED FOUR TIMES THE DISTANCE TO STOP!

12. CHAPTER 5
SO ……….
IF A CAR SPEEDS UP FROM 20MPH TO 60MPH HOW MUCH HAS THE STOPPING DISTANCE INCREASED?
ANSWER: 9 TIMES

13. CHAPTER 5
FRICTION:
THE FORCE THAT KEEPS EACH TIRE FROM SLIDING ON THE ROAD
TRACTION:
IS CAUSED BY FRICTION SO THAT THE TIRES GRIP THE ROAD

14. TIRE TREAD:
GROOVED SURFACES OF THE TIRE THAT GRIP THE ROAD

15. Off Road Mud! Racing High Speed/Water
DIFFERENT TREADS
Off Road
Mud!
Racing
High Speed/Water

16. WORN TREAD
= BLOWOUT!

17. INFLATION AND TRACTION: UNDERINFLATION OVERINFLATION
CHAPTER 5
INFLATION AND TRACTION:
UNDERINFLATION
OVERINFLATION

18. CHECKING TIRE TREAD
IF YOU CAN SEE ALL OF LINCOLN’S HEAD, SWITCH THE TIRE

19. Total Stopping Distance
The time it takes your brakes to stop your car
Oh No There’s a deer!!!!!!
The time it takes to move your foot to the brake
Perception distance
Reaction distance
Braking distance

20. TOTAL STOPPING DISTANCE=
CHAPTER 5
TOTAL STOPPING DISTANCE=
PERCEPTION TIME +
REACTION TIME +
BRAKING DISTANCE

22. VEHICLE CONTROL IN CURVES
FACTORS TO CONSIDER
SPEED
SHARPNESS OF CURVE
BANKED CURVES
LOAD

23. ENTERING A CURVE CAR WANTS TO GO STRAIGHT
THE FASTER YOU GO THE MORE IT WANTS TO GO STRAIGHT!

24. Factors That Effect Braking Distance
Speed
Vehicle Condition
Roadway surface
Driver Ability
Antilock Brakes
Hills
Loads

25. FORCE OF IMPACT FACTORS
SPEED
WEIGHT
DISTANCE BETWEEN IMPACT AND STOPPING

26. SAFETY BELTS ACTIVE RESTRAINTS
CHAPTER 5
SAFETY BELTS
ACTIVE RESTRAINTS

27. PASSIVE RESTRAINTS AIR BAGS
ATOMATICALLY DEPLOY WHEN A COLLISION OCCURS

28. Side Air Bags

29. HOW TO WEAR YOUR SEATBELT
Comfortable
Low and snug across hips
Shoulder belt should be snug across chest

30. AIRBAG DISTANCE
MUST HAVE 10 INCHES BETWEEN YOUR CHEST AND THE AIRBAGIN THE STEERING WHEEL
WHY?

31. HAND POSITION WITH AIRBAG
AND HERE
HERE
WHY?

32. AIRBAG SWITCHES AIRBAGS ARE MADE FOR ADULTS
IF A CHILD IS IN THE FRONT SEAT THE AIRBAG MUST BE TURNED OFF

33. OTHER SAFETY PROTECTION DEVICES
FRONT AND REAR CRASH AREAS
ENERGY ABSORBING BUMPERS
REINFORCED WINDSHIELD

34. HEAD RESTRAINTS

35. CHILD SEATS

36. ENERGY ABSORBING STEERING WHEEL AND COLUMN

37. SIDE DOOR BEAMS

38. AUTOMATIC SEATBELTS

39. PADDED DASH