Describe the  procedure that  provides a method that may be used toapply the two moment-area theorems?

Can someone please help me to solve the following question showing all work and needed diagrams and using the table method. Please and thank you!

Apply the principles of virtual work to solve for:   a) The vertical displacement of Node B b) The horizontal displacement of Node B   For all truss members, E = 29,000 ksi and A = 4in2

1)Why do equipotential surfaces not intersect? Explain briefly. A small drawing would be helpful. 6) Why are electric field lines always perpendicular to equipotential surfaces? Explain your argument mathematically (just showing math without explaining your understanding. of it is not sufficient)

I need right solution according to the question. Thank you

10 k 2 k/ft Al C B 10 ft 10 ft 10 ft