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Homework Help: Braking Distance

  1. Jun 2, 2007 #1
    If the speed of a car is increased by 75%, by what factor will its minimum braking distance be increased, assuming all else is the same? Ignore the driver's reaction time

    I'm not sure how to start this problem. I am not sure what to do without any numbers to use in a formula. I do not know any specific variables for acceleration, distance, or time and i am not sure how i am souposed to relate everything to find the answer...help!
  2. jcsd
  3. Jun 2, 2007 #2
    Please post in the homework forum
  4. Jun 2, 2007 #3


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    Gold Member

    Welcome to PF, Morgan. I can't help at all with any math stuff. I will tell you, though, that from both personal experience and basic engineering the relationship between speed and braking time are not directly proportional. The braking distance goes up more than the speed.
  5. Jun 2, 2007 #4
    Think about the kinematic equations for constant acceleration and how you might eliminate time as a variable.
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