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Homework Help: Net Force on Bolt Problems

  1. Jan 10, 2010 #1
    1. The problem statement, all variables and given/known data

    Four forces act on bolt A as shown. Determine the net force (in Newtons) and direction (in degrees upward from the x-axis) acting on the bolt.

    72559.jpg

    2. Relevant equations
    Law of Sines: a/sinA = b/sinB = c/sinC
    Law of Cosines: a^2= b^2 + c^2 - 2bccosA


    3. The attempt at a solution
    I am totally lost, I really don't know where to even start.
     
  2. jcsd
  3. Jan 10, 2010 #2
    You can start by finding the vector form for each force.
    How would then find the TOTAL force?
     
  4. Jan 10, 2010 #3
    By vector form do you mean to find the opposite of each angle's side length? As in the O for SOH CAH TOA?
     
  5. Jan 10, 2010 #4
    I mean the components for each vector, in the y and x direction.
    [tex] \vec{F} = F_x i + F_y j [/tex].
    You will have to use trig.
     
  6. Jan 11, 2010 #5
    I'm sorry, but I'm still a little lost on what you mean. I know how to do trig but I don't really understand the terminology. By components would you mean to use sin30=x/150 in order to get the opposite length for the force in quadrant 1?
     
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