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Accerleration from power, mass & speed

  1. Jan 21, 2012 #1
    1. The problem statement, all variables and given/known data

    A car of mass 1200 kg produces a maximum power of 50 kW. Find the maximum acceleration of the car when it is travelling at 60 mph.
    (A). 1.6 m/s2. (B). 0.4 m/s2. (C). 0.7 m/s2. (D). 2 m/s2. (E). 3 m/s2

    2. Relevant equations

    P=Fv
    F=ma
    mph-m/s = (miles x 1.6 x 1000)/3600

    3. The attempt at a solution

    P=Fv
    P=mav
    P/mv=a

    m/s= (60 x 1.6 x 1000)/ 3600

    50000/1200x26.6 = 1.56...
    So i'm saying that the anser is 1.6

    i think i have done this right however as i no longer have access to the answers i can't tell. If any thing is wrong could you just point me to the area (i.e. equations or numbers)
     
  2. jcsd
  3. Jan 21, 2012 #2

    gneill

    User Avatar

    Staff: Mentor

    Your answer is fine.
     
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