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Homework Help: What is the magnitude of the resultant of these two forces?

  1. Oct 3, 2009 #1
    1. The problem statement, all variables and given/known data

    Two forces, 370 N at 11◦ and 293 N at 34◦ are
    applied to a car in an effort to accelerate it.

    3765 kg
    370 N
    293 N

    What is the magnitude of the resultant of
    these two forces?
    Answer in units of N

    2. Relevant equations

    3. The attempt at a solution
    I've tried find both xs of the forces using 370cos11=363.20 and 293cos34=242.91 adding them together to get 606.11, then I found the two ys using 370sin11=70.60 and 293sin34=163.84 adding them together to get 234.44. I then added the x^2 and y^2 of the two sums and square rooted them. What am I doing wrong?
  2. jcsd
  3. Oct 3, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi hammerbox! Welcome to PF! :smile:

    (have a degree: º and try using the X2 tag just above the Reply box :wink:)
    Looks ok to me. :smile:

    (btw, you could save a little time by using one of the force directions as your x direction … then you only have to look up cos23º and sin23º :wink:)
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