Question $4$

A truss analysis includes consideration of Joint $A$ as shown. If $P$ is $3\mathrm{.}2kN$ and $Q$ is $5\mathrm{.}2kN,$

find member force $AC$ in $kN.$ Use positive for tension and negative for compression. The

horizontal distance from $A$ to $B$ is $6m,$ the horizontal distance from $A$ to $C$ is $4m,$ and the

vertical distance from $A$ to both $B$ and $C$ is $5m.$