1. Using the method of joints (no other method is acceptable), determine the reactions and the force in each member of the truss shown below and indicate whether the member is in tension or compression. Must show the following to receive full credit. a. Free-body diagram of each joint being analyzed. b. Calculations. Force summary diagram. с. Note: Support A is pinned and support D is a roller. 5 kN 4 m 20 kN 3 @ 5 m = 15 m

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Free Body Diagram

The system of forces acting on a body tends to either rotate it or make the body undergo motion. In general, when an external agent exerts a force on a body, the body undergoes translational motion and rotational motion. The body has six degrees of freedom under the influence of that force. Here, three degrees of freedom are from the translational motion while the other three are from the rotation motion. However, sometimes the bodies are not allowed to undergo any motion and are fixed, under such conditions the body is said to be constrained.