
Concept explainers
through 5.7 Calculate the forces in all members of the trusses shown, using the method of joints.

The forces in the member from method of joints.
Answer to Problem 5.1P
Explanation of Solution
Given:
Two reactions at the pin support is Ax and Ay.
At roller support one reaction is Cy.
Force on the member
Free body diagram of the truss.
Taking moment about A
From equilibrium equations
Considering joint A
From the equilibrium equation
Considering joint C
Conclusion:
Forces in the member
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