Shear and tensile force questions

  1. suppose i have 4 solids like this:
    and the solid have shear stress and tensile stress 12N/mm2 and 15N/mm2 respectively,
    suppose i know the area of each surface,
    how can i judge whether this solid is able to withstand 20N load?
    what kind of formula should i use?

    [​IMG]
     
  2. jcsd
  3. Well, you know the formulas for tensile stress and shearing stress, right ?

    Just apply them !!!
     
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