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Need help with 1D motion

  1. Sep 17, 2007 #1
    1. The problem statement, all variables and given/known dataA police car leaves in pursuit of a holdup car 0.50 h after the latter has left the scene of the crime at 120 km/h. How fast must the police car go if it is to catch up with the holdup car in 1.00h?

    2. Relevant equationsI'm thinking Vf=Vo+at? i must be wrong, I can't seem to get the probelm started

    3. The attempt at a solutionTried so many but it doesn't seem to come out
  2. jcsd
  3. Sep 17, 2007 #2


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    I think you can ignore accelaration since no data is given. So it is simply s = vt
    How far has the first car gone at constant speed when the police car catches it?
  4. Sep 17, 2007 #3
    then distance = 120(1.5), Which equals 180 km. Thank you for the help I didn't even think of it like that.
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