Natural Laws and Car Control

1. Natural Laws and Car Control Chapter 5

2. Gravity • How will gravity affect your speed going uphill? • Lose speed • to keep same speed you must accelerate to overcome gravity

3. Gravity • How will gravity affect your speed going downhill? • Speed will increase • Take longer to stop • Must brake sooner • Look further ahead for hazards

4. Review Gravity

5. The Law of Gravity and Hill Parking

6. When you are parked on an incline, gravity works to pull your vehicle downhill. What are the steps?Downhill with curb To keep your vehicle from rolling, leave your vehicle in low gear or park. Wheels to right Shift to neutral Roll into curb Shift to Park Set Parking Brake

7. What are the steps?Downhill with curb Wheels to right Shift to neutral Roll into curb Shift to Park Set Parking Brake

8. TO THE RIGHT What step do you skip? Yes, there is no curb to roll into. You’ll be parking downhill with no curb. Which way will you turn the wheel?

9. You are already parked uphill without a curb, which way are your wheels turned? TO THE RIGHT Will you put it into neutral and roll? Again, there is no curb to stop us.

10. Center of Gravity • What is it?—The point around which an objects’ weight is evenly distributed • Check out pictures on page 92 and 93 in your textbook.

11. Inflation & TractionCheck out pictures on page 94 & 95 • It is important to have properly inflated tires because… • You will have Poor Traction • Under-inflation (tire not filled up properly)—outside edges will touch ground and will wear out faster • Over-inflation (tire filled up too much)– only center part of tire is touching ground and will wear out faster

12. Total Stopping Distancepictures on page 98 & 99 • TSD = Distance your car travels while you make a stop

13. 3 Parts to total stopping distance 1. Perception time & distance 2. Reaction time & distance 3. Braking distance

14. Factors affecting braking distance • 1. speed • 2. vehicle condition • 3. roadway surface • 4. driver ability • 5. antilock braking system • 6. hills • 7. load (amount of weight in vehicle)

15. Three factors that determine the force of impact • SPEED—example? • WEIGHT—example? 3. DISTANCE BETWEEN IMPACT & STOPPING—example?

16. Seat Belts • Three collisions occur when a vehicle hits a solid object. 1. Vehicle hits object & stops 2. Occupants either hit inside vehicle or restraint devices 3. Occupants may suffer internal collisions when organs impact inside their bodies

17. Always wear your seatbelt!!!