Problem# 4.2
the mass m1=20kg. The magnitude of the total moment B due to the forces extered on bar AB
by the wieghts of the two suspended masses is170 N-m. What is the magnitude of the total
moment due to the forces about point A?
Problem 4.8
The support at the left end of the beam will fail if the moment about A of the 15-kN force F
exceeds 18kN-m. Based on this criterion, what is the largest length of the beam?
Problem 4.10
The force F= 12kN. A structural engineer determines that the magnitude of the moment due to F
about P should not exceed 5kN-m. What is the acceptable range of the angle L? Assume tahat
0<+L<=90*.
Problem 4.11
The length of bar AB is 350 mm. The moments exerted about points B and C by the vertical
force F are Mb=-175 kN-m and Mc=-420 kN-m. Determine the force F and the length of bart AC.
Problem 4.15
The magnitudes of the forces exerted on the pillar at D by the cables A, B and C are equal:
Fa=Fb=Fc. The magnitude of the total moment about E due to the forces exerted by the three
cables at D is 1350 kN-m. What is Fa?