To calculate internal forces in structural members under different loading and support cos$.$ Consider the cantilever beam shown in the image below: $($Figure $1)$

If the internal loadings acting on the beam at $B$ are to be determined, we make an imaginary cut at section $a-$a perpendicular to the axis of the beam and separate the beam into two segments. The internal loadings at $B$ then become external on the free$-$body diagram of each segment, as shown in the image below: $($Figure $2)$

The force component $N_B$ acting perpendicular to the cut, or parallel to the axis of the beam, is called the normal force; the force component $V_B$ acting tangentially to the cut, or perpendicular to the axis of the beam, is called the shear force; the couple moment $M_B$ is called the bending moment.

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Consider the cantilever beam and loading shown in the image below where $d=11\mathrm{.}0ft,w_B=610l\frac{b}{f}t,$ and $w_A=390l\frac{b}{f}t.($Figure $3)$

Determine the magnitudes of the internal loadings on the beam at point $C.$

Express your answers, separated by commas, to three significant figures.

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Part B $-$ Internal Loading on a Semicircular Member

Consider the semicircular member and loading shown in the image where $d=0\mathrm{.}830m$ and $F=65\mathrm{.}0N.($Figure $4)$

Determine the magnitudes of the internal loadings on the beam at point $B.$

Express your answers, separated by commas, to three significant figures.

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