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Homework Help: Resolving forces

  1. Sep 29, 2007 #1

    Could someone please show me how to draw the diagram for the following question as I am really stuck. I would really appreciate any help.

    I have already drawn a diagram but must have labelled the forces incorrectly as my subsequent answers do not match the ones in the back of the textbook.

    Forces P, Q, R and S act on a particle at O in the plane of the coordinate axes Ox, Oy, making angles p, q, r, s respectively with Ox, each angle being measured in the anticlockwise sense. Find the magnitude of the resultant and the angle it makes with Ox when:

    (a) P = 2N, Q = 3N, R = 4N, S = 5N p = 0, q = 40, r = 100, s = 150

    Thank you.

  2. jcsd
  3. Sep 29, 2007 #2
    Do you know the triangle law of vector addition? Use it. You have the angles, and the magnitudes...
  4. Sep 29, 2007 #3
    Thanks for your help.

    I'm not sure what the angles are from anticlockwise.

  5. Sep 29, 2007 #4


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    divide the forces into horizontal and vertical components...

    what is the horizontal component of P? what is the vertical component of P?
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