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Math Help - Non-Concurrent Coplanar forces

  1. #1
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    Non-Concurrent Coplanar forces

    Can anyone help to show me the method of how to find the answers of this question.

    Non-Concurrent Coplanar forces-non-concurrent-coplanar-forces.jpg

    the books says the Answers are: A = 5.30 kN
    B = 3.95 kN


    any help is appreciated.
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  2. #2
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    Quote Originally Posted by wellthen View Post
    Can anyone help to show me the method of how to find the answers of this question.

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    the books says the Answers are: A = 5.30 kN
    B = 3.95 kN


    any help is appreciated.

    \sum \tau = 0 about point B.

    2.5\cos(45) \cdot 6 = A \cdot 2

    A = 7.5\cos(45) = 5.3 kN


    \sum F_x = 0<br />

    A = 2.5\cos(45) + B_x

    B_x = A - 2.5\cos(45) = 3.54 kN


    \sum F_y = 0<br />

    B_y = 2.5\sin(45) = 1.77 kN


    B = \sqrt{B_x^2 + B_y^2} = 3.95 kN
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    thanks for the quick response ^_^
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