The beam shown $($Figure $1)$ is supported by a pin at AA and a cable at BB$.$ Two loads PP $=20$ kNkN are applied straight down from the centerline of the bottom face. Determine the state of stress at the point shown $($Figure $2)$ in a section $2$ m from the wall. The dimensions are ww $=4\mathrm{.}6$ cmcm $,$ hh $=11\mathrm{.}5$ cmcm $,$ LL $=0\mathrm{.}8$ mm $,$ aa $=1\mathrm{.}5$ cmcm $,$ and bb $=4$ cmcm $.$

Part A $-$ Normal stress due to the axial load

Part complete

What is the normal stress at the point due to the axial load in the beam? Let a compressive stress be negative.

Express your answer with appropriate units to three significant figures.

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axialaxial $=$

$-6\mathrm{.}55$ MPaMPa

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Correct

Part B $-$ Normal stress due to bending

The section $2$ m from the wall also has a bending moment, which causes a normal stress at points that are not on the neutral axis. What is the normal stress at the point due to the bending moment? Let a compressive stress be negative.

Express your answer with appropriate units to three significant figures.

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bendingbending $=$

$28\mathrm{.}9$MPa

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Incorrect; Try Again

Part C $-$ Shear stress

The shear force in the beam is also not zero $2$ m from the wall. What is the magnitude of the shear stress in the xyxy$-$plane at the given point?

Express your answer with appropriate units to three significant figures.

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$=$

$82$MPa

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Incorrect; Try Again

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