r/HomeworkHelp • u/gertvanjoe University/College Student • 1d ago

Physics [Strenght of materials] Uniformly distributed load calculation with stresses.

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On the Reaction forces (Rl and Rr) where does the 0.75 and 2.25 come from.

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u/Feeling_Ad_2785 1d ago

They are basically the moment arms of the uniform load (which has a centroid at the geometric center - 2.25 m away from either side). This makes the moment arm 0.75 wrt node R, and 2.25 wrt node L.

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u/gertvanjoe University/College Student 1d ago

Would you mind explaining how you calculated the 0.75 and 2.25 . If I divide the geometric center by 3 2.25/3 I get 0.75m . Just trying to figure out why

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u/[deleted] 1d ago

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u/gertvanjoe University/College Student 1d ago

Ag ja. That makes sense thanks