Like Us for a Discount See us on YouTube Tweet
Returning Students: Course Login
California Driver's Permit, Drivers Education, Lessons, Tests
LOGIN

4. Physics and Natural Laws

Page 1 of 19 Next » Back to Lessons   Quiz  

69
10. Momentum

The force of a moving object is called momentum. The momentum of an object is proportional to its weight and speed. For example, a brick traveling at 10 MPH has more momentum (force) than a chunk of Styrofoam traveling at the same speed. Energy cannot be created nor destroyed?it can only be converted into another form of energy.


When you are driving, both you and your vehicle have acquired momentum which is proportional to the weight of your vehicle and its speed. If you increase your speed from 10 MPH to 20 MPH, you double your car's momentum, and if you increase your speed from 10 MPH to 50 MPH, you increase your car's momentum five times.


When you make a controlled stop, the momentum of your vehicle must be overcome by the:

  • friction force of your brakes
  • friction force between your tires and the road
  • compression force of your engine

  • When you are in a crash, the momentum and kinetic energy of your vehicle and body must be absorbed, which results in heat, the deformation of your vehicle, and possible injury to your body.


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


      1.   
      2.   
      3.   
      4.   


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


      1.   
      2.   
      3.   
      4.   


    3. Centrifugal force:


      1.   
      2.   
      3.   
      4.   


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


      1.   
      2.   
      3.   
      4.   


    5. Gravity:


      1.   
      2.   
      3.   
      4.   



      

    Page 1 of 19 Next »  Back to Lessons  Quiz  




    Start Now! Get your California Drivers Ed Certificate