Results 1 to 2 of 2

Math Help - resultant force

  1. #1
    Newbie
    Joined
    Apr 2009
    Posts
    21

    resultant force

    Hiya, need help with this as i dont know how to find resultant force of more than 2 forces.

    Q) Forces P, Q and R act on a particle at O in the plane of the coordinate axes Ox, Oy. Force P acts along Ox, Q acts along Oy, and R acts at an angle a with Ox, in the first quadrant. Calculate magnitude of the resultant force and angle it makes with Ox.

    P = 3N, Q = 4N, R = 5N, a = 60 degrees

    I would really like if someone can draw diagrams too, any help will be appreciated.

    thx.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    12,114
    Thanks
    988
    Quote Originally Posted by Sundae View Post
    Hiya, need help with this as i dont know how to find resultant force of more than 2 forces.

    Q) Forces P, Q and R act on a particle at O in the plane of the coordinate axes Ox, Oy. Force P acts along Ox, Q acts along Oy, and R acts at an angle a with Ox, in the first quadrant. Calculate magnitude of the resultant force and angle it makes with Ox.

    P = 3N, Q = 4N, R = 5N, a = 60 degrees

    I would really like if someone can draw diagrams too, any help will be appreciated.

    thx.
    let Z = the resultant vector

    P_x + Q_x + R_x = Z_x

    3 + 0 + 5\cos(60) = Z_x


    P_y + Q_y + R_y = Z_y

    0 + 4 + 5\sin(60) = Z_y

    |Z| = \sqrt{(Z_x)^2 + (Z_y)^2}

    direction for Z ...

    \theta = \arctan\left(\frac{Z_y}{Z_x}\right)
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. resultant force
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: September 13th 2010, 10:21 PM
  2. Need help with resultant force
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: April 16th 2009, 04:03 PM
  3. Resultant force
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: January 21st 2009, 08:37 AM
  4. Resultant Force
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: November 5th 2008, 02:01 AM
  5. Resultant Force ?
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: March 16th 2008, 03:14 AM

Search Tags


/mathhelpforum @mathhelpforum