Explain How to solve problems that involve rigid bodies in equilibrium.
Identify the system of one or multiple objects to be analyzed. Identify all forces acting on the system. Identify information given in the problem. Identify the quantity that needs to be determined.
Set up a free-body diagram for the object. Choose the correct frame of reference and coordinate system. Draw a free-body diagram for the system, including all the forces that act on the system, directed towards correct directions. Decide the sign convention for the direction of forces, these conventions need to be followed throughout the problem.
Determine the location of the axis of rotation or the pivot point with respect to which torques of acting forces are to be computed. Indicate the location of the pivot and the lever arms of acting forces, which are needed for the correct computations of torques.
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