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Homework Help: Find the size of force acting on the body

  1. Apr 28, 2010 #1
    1. The problem statement, all variables and given/known data
    One body whit m=50kg is pulled whit a acceleration a=2m/s2 on an horizontal plane whit an unknow force F which is making whit the plane an angle of 30 degree
    The friction coeficient betwen the body and plane is [tex]\mu[/tex]=0.2.Find the size of the force F.




    m=50kg
    a=2m/s2
    [tex]\mu[/tex]=0.2
    [tex]\alpha[/tex]=30

    I need to find the size of force acting on the body

    http://img11.imageshack.us/img11/7561/61868200.png" [Broken]
    2. Relevant equations



    3. The attempt at a solution
    Well i tried to calculate the force whit Newton's formula F=m*a;
    Then whit force compontents on Ox,Oy
    Oy:N-G-Fy=0
    Ox:Ff-Fx=m*a

    But my question is "size of force acting on the body" is Fx?!or Fy?!
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 28, 2010 #2

    rl.bhat

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    Homework Helper

    Re: Mechanic

    Please post the full text of the problem.
     
  4. Apr 28, 2010 #3

    Borek

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    Staff: Mentor

    Re: Mechanic

    Resultant.
     
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