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Tensile strength question

  1. Sep 25, 2004 #1
    Having a bit of a problem with this question,

    Find the minimum diameter of an alloy cable, tensile strength 75 MPa, needed to support a load of 15 kN.

    I know the answer is 1.6cm but i need someone to help explain how to get it.

    Ive got this far...

    Tensile strength of cable = 75 MPa = 75 000 000 newtons per square meter
    = 7.5 x 10^7 m^-2
    The weight material required to hold = 15kN = 15 000 N
  2. jcsd
  3. Sep 25, 2004 #2


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    Staff Emeritus
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    Gold Member

    Look at the units.

    Tensile Strength is a measure of stress, or force per unit area.
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