The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint O. Determine the magnitude of the resultant R of the two forces and the angle which R makes with the positive x-axis. The angle 0 is measured counterclockwise from the positive x-axis. 4.1 kN 2.0 KN- Answers: R= i 0= i 37° 519 KN

The two structural members, one of which is in tension and the other in compression, exert the indicated forces on joint O. Determine the magnitude of the resultant Rof the two forces and the angle e which R makes with the positive x-axis. The angle e is measured counterclockwise from the positive x-axis. 4.5 kN 2.0 kN 37° 65 Answers: R = i kN i

4.165 Calculate the forces in members AB and DE. E D 8 kN C B 12 kN 1.5 m 2.5 m 2.5 m 1.5 m Figure P4.165 3 m 1.25 m

Determine the bending moment at point C of the beam shown. 0.5 kN/m A I 3 m C · 6 m 1.5 kN/m B