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4. Physics and Natural Laws

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75
16. Banked Roadways

Banked roadways improve your traction in turns. They help in overcoming the centrifugal force that is pulling you away from the direction in which you want to turn.


In order to keep a vehicle in a turn without allowing centrifugal force to pull the car out, you should:

  • decelerate before the curve
  • brake gently and gradually while turning
  • downshift (manual transmission)

  • The pictures to the left illustrate what traffic engineers do when designing a banked curve and safe speeds.


    Click on pictures to see full-size image




    Lesson Summary


      

    Lesson 4 Quiz


    You will now answer 5 questions to test what you learned during this lesson. You must answer all questions correctly to receive completion credit for this lesson. You may answer the questions as many times as necessary to get them right.

    You should review the lesson material if you don't do well on the quiz.

    1. The best way to maximize the traction of your tires is to:


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    2. According to the formula for stopping distance, how many feet will it take you to stop, from 60 mph?


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    3. Centrifugal force:


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    4. Gravity:


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    5. The primary factor in decreasing the Kinetic Energy of an object is to:


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