1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook