1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Science Advisor
    Homework Helper

    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.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook