Minimum stopping distance

  • #1
ubergewehr273
140
5

Homework Statement


In order to stop a car in shortest distance on a horizontal road, one should,
(a) Apply brakes very hard so that the wheels stop rotating
(b) Apply the brakes hard enough to just prevent slipping
(c) Pump the brakes (press and release)
(d) Shut the engine off and not apply brakes

Homework Equations


NIL

The Attempt at a Solution


I think the solution might be (a) because after the wheels stop rotating altogether, friction would stop the car entirely.
But I might as well be wrong.
 

Answers and Replies

  • #2
36,173
13,162
Friction stops the car in all setups. But how fast does it stop? What is the force that stops it?
 
  • #3
ubergewehr273
140
5
Well, there is no mention of it in the question...
 
  • #4
PeroK
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Is this a question from the driving test?
 
  • #5
36,173
13,162
Well, there is no mention of it in the question...
Those are questions for you to answer.
 

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