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Here i go Again, Phy 11 Forces

  1. Nov 12, 2009 #1
    1. The problem statement, all variables and given/known data

    A 1500kg car traveling at 72km/h experiances an air reistance of 2000N and a road Friction of 1500N, if the wheels push with a force of 8000N find the Cars Acceleration, cars velocity after 35 seconds and Distance traveled in 1 minute.

    2. Relevant equations

    M= 1500kg Fa= 8000 Vi=72km/h.. thats all i figured out, Ffriction is 2000+1500??

    3. The attempt at a solution
    uhmmm i found out Acceleration is 3 m/s(squared) because i did (Fnet/m)=a
    which was 4500/1500 =3 (8000-3500)/1500
     
  2. jcsd
  3. Nov 12, 2009 #2

    jgens

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    Gold Member

    Good job finding the acceleration! Now, what have you tried for the other problems?
     
  4. Nov 12, 2009 #3
    uhh
    i used the formula vf=vi+at and converted the 72km/h to the units m/s
    and im stuck there
     
  5. Nov 12, 2009 #4

    jgens

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    Gold Member

    Well, you know the acceleration, time, and initial velocity so you should easily be able to solve for the final velocity. What's tripping you up?
     
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