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Homework Help: Need Help with Conversion Problem

  1. Feb 2, 2010 #1
    A vehicle moves in a straight line with an acceleration of 7km/h^2. By how much does the speed change each second? Answer in units of km/h






    Was trying to convert to seconds and got 0.0019km/s but not sure from there.

    If someone could help that would be great.
     
  2. jcsd
  3. Feb 2, 2010 #2
    I believe your answer is right. Just fix up your units.
     
  4. Feb 2, 2010 #3
    I tried the answer and supposedly it is wrong. 0.0019km/s = 7km/h tried both and still got wrong answer. I am really confused.
     
  5. Feb 2, 2010 #4
    The number 0.0019 is right, but not the units km/s.
     
  6. Feb 2, 2010 #5
    If i convert back to hours then 0.0019km/s is 7km/h. Not sure if that is what you meant?
     
  7. Feb 2, 2010 #6
    What I meant is that for you final answer, the number 0.0019 is correct, but it is not followed by the unit km/s. Rather, it is followed by the unit km/h. So the answer is 0.0019 km/h.
     
  8. Feb 2, 2010 #7
    My homework is for an online course and the units do not matter in the answer section. Unfortunately it says 0.0019 is a wrong answer.
     
  9. Feb 2, 2010 #8
    Were you supposed to put in a certain number of sig digs? Because the answer is 7/3600.
     
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