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Thread: Complex Maths - Measurement

  1. May 20th 2008, 04:30 PM #1
    Risrocks
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    Complex Maths - Measurement

    As part of my Residential Drafting course I'm required to complete Complex Mathematical concepts, which I'm really struggling with. Your answer is really appreciated:
    Q: A mass rests on an area of 80mm2 and exerts a force of 320 kg m/s2. Express the pressure exerted on this area in kN/cm2.
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  2. May 20th 2008, 04:41 PM #2
    topsquark
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    Quote Originally Posted by Risrocks View Post
    As part of my Residential Drafting course I'm required to complete Complex Mathematical concepts, which I'm really struggling with. Your answer is really appreciated:
    Q: A mass rests on an area of 80mm2 and exerts a force of 320 kg m/s2. Express the pressure exerted on this area in kN/cm2.
    P = \frac{F}{A} = \frac{320~N}{80~mm^2} = 4~\frac{N}{mm^2}

    Now to change the unit:
    \left ( \frac{4~N}{1~mm^2} \right ) \cdot \left ( \frac{1~kN}{1000~N} \right ) \cdot \left ( \frac{10~mm}{1~cm} \right )^2
    (Note that the last factor is squared!)

    =0.4~kN/cm^2

    -Dan
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  3. May 20th 2008, 06:10 PM #3
    Risrocks
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    Fantastic ... thanks for your quick reply!
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