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Motion in 1(?) dimension.

  1. Jan 24, 2008 #1
    A car traveling at 16.0 m/s runs out of gas while traveling up a 21.0 degree slope.

    How far up the hill will it coast before starting to roll back down?

    I tried

    1/2mv^2=mgh
    1/2(16)^2=9.8h
    13.06=h

    can any one confirm if this is correct or not. I;m not sure if I have to use trig to solve this or not.

    help please.
     
  2. jcsd
  3. Jan 24, 2008 #2
    looks good. the question is asking for the distance up the hill not just simply the height difference, so you'll have to use trig to find that.
     
  4. Jan 24, 2008 #3
    si it would be sin(21)=13.06/x

    x being the hyp/answer?
     
  5. Jan 24, 2008 #4
    yea that was the answer
     
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