the tangential rotation.

To use the virtual work method, start by removing the real loads and place a unit load or unit couple moment at the desired location in the direction the displacement or rotation is to be determined For example, to determine the downward deflection at $C$ due to the

Figure

$3$ of $3$

For the frame shown in $($Figure $3),$ determine the horizontal deflection at $C$ when $a=8ft,b=18ft,$ and $w=60\frac{k}{f}t.$ Assume $A$ is pinned, $C$ is a roller, and $B$ is fixed. Take $E=2\mathrm{.}9{10}^4$ksi and $I=400i{n}^4.$

Express your answer in the appropriate units to three significant figures.

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