Because of long-term loading from the 900-N tension in the power line, the uniform utility pole has developed a lean. If the mass per unit length of the 9-m pole is 24 kg/m and the mass of the lamp fixture is negligible, determine the reactions at the ground support A.

Problem 6 Two cables of the same gauge are attached to a transmission tower at B. Because the tower is slender, the horizontal component of the resultant of the forces exerted by the cables at B is to be zero. Knowing that the mass per unit length of the cables is 0.4 kg/m, determine (a) the required sag h, (b) the maximum tension in each cable. -90 m- A h B 60 m → 3 m Figure Problem 6 с

B 300 mm ↑ 15 mm 70 KN 70 KN 20 mm 500 mm Steel Aluminum AMIN ATTIV 70 kN 70 KN + Rc A steel rod (20 mm diameter) 500 mm long is connected to two parallel aluminum rods (15 mm diameter) each 300 mm long via a rigid plate as shown. Two 70 kN loads at applied at the end of each aluminum rod. The structure is fixed at both ends resulting in a statically indeterminate system that can be treated as the superposition of two determinate systems as presented above. Note that Rc is the reaction at C. Assume Esteel = 200 GPa and Ealuminum = 70 GPa. a) Determine the reaction force at C, Rc b) Determine the reaction force at A and B and the normal stress in the steel and aluminum rods c) Which rods are in tension and which are in compression?

1. Describe three ways in which particle equilibrium problems differ from rigid body equilibrium problems. fixel pin The beam below is loaded as shown. It is to be supported at points A and C. Choose supports from the options below to place at each endpoint that would create a statically determinate problem. Then solve the problem to find the reactions at the supports. 20N HON A wir ↑ roller pin va or fixed HA 3