Example 1 - Virtual
Work
Strategy:
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A weightless beam has an applied load P acting at
end C of the beam and is supported by a frictionless pivot at B shown
below. Use the method of virtual work
to find the external force Q acting at A to maintain equilibrium of the beam. Step 1:
There is one degree of freedom.
Pick θ the angle of rotation of the beam (CCW
positive). Step 2:
Pick coordinate axes, x and y with origin at B (a fixed point). Click here to continue with this example. |
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