Prove Δv/v = Δe/1+e

Problem 1 Find the reaction forces of the supports on the beam and the forces in the articulated joints. Check on the calculations using the principle of virtual works. 91² 2ql B q A *+++ 1 t l 1 21 ^ t 1

Problem 6: Inputs: ● ● ● a = 600 mm b = 400 mm c = 200 mm F = 100 N The line of action of the force vector passes through points B and C. B X Z (a) Use the cross product to compute the moment about point A. For this part, you must use B in your vector formulation. F That is, compute MA = B x F. Express your answer as a vector and convert "mm" to "m". IB a A IC с (b) Now use a different position vector, r, in the cross product. This time use rc to to compute the moment about point A. For this part, you must use rc in your vector formulation. Compute MA = rcx F. Express your answer as a vector and convert "mm" to "m". c) Do your answers agree? Yes or no. F y