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Simple Force Question

  1. Sep 21, 2008 #1
    1. The problem statement, all variables and given/known data
    (a) A car with a mass of 850kg is moving to the right with a constant
    speed of 1.44 m/s . What is the total force on the car? (b) What is the total
    force on the car if it is moving to the left?


    2. Relevant equations
    F=ma


    3. The attempt at a solution
    (a)F = 850kg(1.44m/s) = 1.22 x 10 third power
    (b) is the same

    Does this seem right?
    Thanks,
    Kevin
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 21, 2008 #2
    Note the constant speed. If there is constant speed, there is no acceleration. Therefore:

    F_net must equal zero.

    F=ma

    You don't plug in velocity for the acceleration in that equation.
     
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