PLTL: Ch$.4\mathrm{.}2$

Consider the given figure with a force acting at $\backslash ($ A $\backslash ).$ Draw the

$150$ lb free$-$body diagram of member $\backslash ($ A B C $\backslash ).$ Determine the reactions at $\backslash ($ C $\backslash )$ and $\backslash ($ D $\backslash ).$

$-$ Identify the two$-$force member and the three$-$force member.

$-$ For the two$-$force member, identify the line of action of the force. Draw its force as a single unknown on the FBD of the other member.

$-$ Since the lines of action of two forces are known, find the line of action of the force at $\backslash ($ C $\backslash ).$

$-$ Apply equilibrium and solve.