Part B $-$ Tutorial: Steps to find the internal forces in structural members. To calculate the internal normal force, shear force, and bending moment at a point in a beam.

In the figure, A beam with length $L=2\mathrm{.}9m$ is supported by a pin joint at A and a cable attached at $C$ as shown in$.$ It is subjected to the distributed load with $w1=1\mathrm{.}3k\frac{N}{m}$ and $w2=1\mathrm{.}7k\frac{N}{m}.$ The angle between the cable and the beam in degrees is $q=40.$ Determine the reaction at $A,$ nomal force, shear force, and bending moment acting at point $B,$ located $x=0\mathrm{.}7m$ to the left of the end of the beam.

Steps:

Start with the FBD of the beam.

Find the forces accociated by the distributed weights $w1$ and $w2.$

Find the support reactions for the beam using the free$-$body diagram shown in$.($The tension can be found from the equilbrium equations, where the sum of moment about $A$ is set to $0$