The bracket is held to the wall using three $\backslash (\backslash$mathrm$\{$A$\}-36\backslash )$ steel bolts at $\backslash ($ B$,$ C $\backslash ),$ and $\backslash ($ D $\backslash ).$ Each bolt has a diameter of $0\mathrm{.}8$ in $.$ and an unstretched length of $2$ in $.$

Part A

If a force of $\backslash ($ P$=450\backslash$mathrm$\{$lb$\}\backslash )$ is placed on the bracket as shown, determine how far, $\backslash ($ s $\backslash ),$ the top bracket at bolt $\backslash ($ D $\backslash )$ moves away from the wall. For the calculation, assume that the bolts carry no shear; rather, the vertical force of $450$ lb is supported by the toe at $\backslash ($ A $\backslash ).$ Also, assume that the wall and bracket are rigid. A greatly exaggerated deformation of the bolts is shown in the figure.

Express your answer to three significant figures and include appropriate units.

$\backslash (\backslash$times $\backslash )$ Incorrect; Try Again; $5$ attempts remaining