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Homework Help: Forces Questions

  1. Sep 23, 2007 #1
    1. The problem statement, all variables and given/known data
    While two forces act on it, a particle is to move at the constant velocity = (3.9 m/s) - (-3.6 m/s). One of the forces is 1 = (1.446064618687 N) + (-5.679751753869 N). What is the other force?


    2. Relevant equations
    f=ma


    3. The attempt at a solution

    I don't know an equation to use with velocity in it that would work for this problem. Can someone help me out?
     
  2. jcsd
  3. Sep 23, 2007 #2

    Astronuc

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    Staff Emeritus
    Science Advisor

    Since the particle is moving at constant velocity, there is no acceleration, therefore the net force or sum of forces = 0. The components of the other force must be equal in magitude and in the opposite directions.
     
  4. Sep 23, 2007 #3

    Doc Al

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    Staff: Mentor

    The key point is that the velocity is constant. What does that tell you about the particle's acceleration and the net force on it?
     
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