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## Main Question or Discussion Point

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?

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?