Find Force in CF. 1 kN •The truss has both X & Y forces. 1 kN 1 kN 1 kN B D 1 kN 2 m A E 2 m H 2 m G 2 m F 2 m

The Free-Body diagram for joint D is drawn assuming that all internal forces are in tension. Solve for the forces in AD and CD. The forces are positive if in tension, negative if in compression. CD 41° D AD 3530 N Answers: AD = i N %3D CD = i

Calculate the forces in members BC, BE, and EF. Solve for each force from an equilibrium equation which contains that force as the only unknown. Modification: Change load to 8.9 kN, length of members AG and BF to 4m. Use the method of sections 14 kN A 3 m В 3 m C 3 m 2 m 3 m 3 m E G F