If a mass of 76 kg acts downward 0.38 m from the axis of rotation on one end of a board and another force of 129 N also acts downward, what

Question

If a mass of 76 kg acts downward 0.38 m from the axis of rotation on one end of a board and another force of 129 N also acts downward, what is the moment arm of the second force to balance this system

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Delwyn 3 years 2021-08-06T17:40:25+00:00 1 Answers 5 views 0

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  1. Adela
    0
    2021-08-06T17:42:05+00:00
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    Answer:

    y = 2.196 m

    Explanation:

    Mass, m = 76 kg

    distance from axis of rotation, x = 0.38 m

    Second Force, F = 129 N

    moment arm of the second force, y = ?

    Now, equating moments for the equilibrium

    So,

    m g × x = F x y

    76 x 0.38 x 9.81 = 129 x y

    y = \dfrac{76\times 0.38\times 9.81}{129}

    y = 2.196 m

    Hence, the length of the moment arm is equal to 2.196 m.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )