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Homework Help: Velocity and displacement

  1. May 18, 2010 #1
    1. The problem statement, all variables and given/known data

    The acceleration a ms^-2 of a car is given by a=18t - 4 where t is the time in seconds.Derive expressions for the velocity v ms^-1 and the displacement x m if the initial velocity and displacement are both zero

    2. Relevant equations

    3. The attempt at a solution
    would really appreciate any help with this.I have no idea where to start!Trying to get a sample answer so i can study it to past exam paper questions
  2. jcsd
  3. May 18, 2010 #2


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    Homework Helper

    Start with the definition of acceleration:

    acceleration is the rate of change of velocity, so a= dv/dt.

    If you replace 'a' by 'dv/dt' in your equation, can you find 'v'?
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