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Math Help - Find unknown

  1. #1
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    Question Find unknown

    Hi i was just wondering if its possible to get the T from the following:

    ΣMA = - 4.66 (2.5 – 0.12) − 10 (5-1.5-0.12) + Tcos25o0.25
    + Tsin25o(5-0.12) = 0

    If so how?
    thanks
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by taurus View Post
    Hi i was just wondering if its possible to get the T from the following:

    ΣMA = - 4.66 (2.5 0.12) − 10 (5-1.5-0.12) + Tcos25o0.25
    + Tsin25o(5-0.12) = 0

    If so how?
    thanks
    You are trying to make it too hard.
    Let B = - 4.66 (2.5 0.12)
    Let C = − 10 (5-1.5-0.12)
    Let D = cos25o0.25
    Let E = sin25o(5-0.12)

    Then your equation reads:
    B + C + D \cdot T + E \cdot T = 0
    which I'm sure you can solve for T.

    Don't get lost in the numbers. No matter how complicated they get, they're still just numbers.

    -Dan
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  3. #3
    MHF Contributor
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    ΣMA = - 4.66 (2.5 0.12) − 10 (5-1.5-0.12) + Tcos25o0.25
    + Tsin25o(5-0.12) = 0

    If that is
    ΣMA = - 4.66*(2.5 0.12) − 10*(5 -1.5 -0.12) + Tcos(25degrees)*(0.25)
    + Tsin(25deg)*(5 -0.12) = 0,
    then,

    4.66(2.38) -10(3.38) +T(0.25)cos(25deg) +T(4.88)sin(25deg) = 0
    11.0908 -33.8 +T(0.226576947) +T(2.062377117) = 0
    -22.7092 +T(2.288954064) = 0
    T = 22.7092 / 2.288954064
    T = 9.921212643 ---------------------answer.
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