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Required information

A worker tries to move a rock by applying a $404-$N force $\backslash (\backslash$mathbf$\{$P$\}\backslash )$ to a steel bar as shown.

Two workers attempt to move the same rock by applying a vertical force at $\backslash ($ A $\backslash )$ and another force at $\backslash ($ D $\backslash ).$ Determine these two forces if they are to be equivalent to the force$-$couple system at $\backslash ($ D $\backslash ).$

The two forces, $\backslash ($ F$\_\{$A$\}=\backslash )\backslash (\backslash$mathrm$\{$N$\}\backslash$downarrow $\backslash )$ and $\backslash ($ F$\_\{$D$\}=\backslash )\backslash (\backslash$mathrm$\{$N$\}\backslash$boxtimes $\backslash )\backslash (\{\}^\{\backslash$circ$\}\backslash ),$ are equivalent to the force$-$couple system obtained in part $\backslash ($ a $\backslash ).$