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Homework Help: Constant Acceleration: find time

  1. Jan 15, 2017 #1
    1. The problem statement, all variables and given/known data
    A man was driving a car at 78 km/h, he saw a deer at the distance of 101m, how much time is needed so that the car slows down after it drove 99m and stops.

    2. Relevant equations
    Δx = 1/2 (vi + vf) * t​

    3. The attempt at a solution
    I'm thinking about finding the Δx
  2. jcsd
  3. Jan 15, 2017 #2


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    Science Advisor
    Homework Helper
    Gold Member

    not sure I understand. Are you saying you do not know how to determine Δx? It is given.
  4. Jan 15, 2017 #3


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    Staff: Mentor

    Aren't you given the Δx? How far did the car drive until it stopped?

    Edit: Oops! @haruspex got there before me!
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