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Homework Help: Non-equilibrium applications of Newton's Laws of motion

  1. Nov 13, 2009 #1
    1. The problem statement, all variables and given/known data
    A 1380kg car is moving due east with an initial speed of 27 m/s . after 8.00s the car has slowed down to 17.0 m/s . Find the magnitude and direction of the net force that produces the deceleration

    2. Relevant equations
    Net force of x= MAx
    Net force of y= MAy

    3. The attempt at a solution
    I am not sure how to start this question. Can anyone give me hints to start out this questions?
  2. jcsd
  3. Nov 13, 2009 #2
    You know the mass, and can find the acceleration with the given data.
  4. Nov 14, 2009 #3

    Ok, you know the Velocity change in a certain amount of time.This is actually what we call "acceleration" and as you know if there is an acceleration then there must be a force acting in these conditions.So i advice you to calculate the acceleration then use Newton's 2nd law (F=m.a)....
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