When you press braking pedal -- wheel road surface tangent F

  • Thread starter Gunmo
  • Start date
  • #1
11
1
- You are driving car with 100 mile/hour

- You are pressing brake pedal.

- The speed of car is suddenly gone down. Decelerated.

- However, Wheel is rolling on road without sliding and car stopped smoothly finally.


In this case,

- the tangent force acting on road surface is related with deceleration rate dv/dt ?

- or as long as there is no sliding of wheel, tangent force is not relevant.

- Please do not count detailed contact mechanic.
 

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Answers and Replies

  • #2
billy_joule
Science Advisor
1,200
331
Can you draw a free body diagram of the situation? Could a car ever move (on level ground) if no tangent force could act? ie if the wheels were frictionless?
 

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