The uniform beam is supported by two rods AB and CD that have cross-sectional areas of 10 mm... | MM

The uniform beam is supported by two rods AB and CD that have cross-sectional areas of 10 mm^2 and 15 mm^2, respectively. Determine the intensity w of the distributed load so that the average normal stress in each rod does not exceed 300 kPa. [Mechanics of Materials]

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[rozhmahmood]

You are squared the area in the stress formula again Thank you my friend

[burgerlover]

If the area was given as is such as 10mm^2, why was the area squared again in the denominator from the stress formula?

[biyavduhoky]

@stemslover5742 hello, did you made the video again?

[stemsolver]

Sorry my friends, I realized my mistake but I didn't fix it completely. Thanks Daniel for pointing it out. The areas are given, so when plugging them in the formula, we don't need to square them again. Therefore, Fab = 0.3(10) = 3 N; Fcd = 0.3(15) = 4.5 N; & w = 2.5 N/m. For w, use summation of all forces in y direction, that is +3 + 4.5 - (1/2)*6*w = 0, solve for w. Again sorry for this inconvenience. I'm thinking of remaking this video.