A beam with L=6m is subject to two concentrated loads,
P1=8000 N and P2=4000 N.
- Determine the support forces R1 and R2.
- Sketch the diagrams for the internal internal shear force V(x) and
the internal moment M(x) and calculate the values of V(x) and M(x)
at x/L = 0 , 1/3 , 1/2 , 2/3 , 1