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Homework Help: Maximum height of a uniform vertical column

  1. Nov 11, 2004 #1
    There is a maximum height of a uniform vertical column made of any material that can support itself without breaking, and it is independent of the cross-sectional area.

    (a) Calculate this height for steel (density 7.8 103 kg/m3).

    (b) Calculate this height for granite (density 2.7 103 kg/m3).
     
  2. jcsd
  3. Nov 11, 2004 #2
    You have to know limit of durability of material
    M*g=σ*s
    M=ρ*l*S
    g*l*ρ=σ
    l=σ/(g*ρ), where ρ=density, σ=limit of durability (maximal stress), S=Area
     
  4. Nov 11, 2004 #3
    How do I find the limit durability of material?
     
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