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$($a$)$ Determine the reactions at A and $E$ if $P=540N.$ The reactions are positive if to the right or up$,$ negative if to the left or down.

$($b$)$ What is the maximum value which $P$ may have for static equilibrium? Neglect the weight of the structure compared with the applied loads.

Answers:

$($a$)$ If $P=540N,$

$($b$)$ The maximum value which $P$ may have for static equilibrium:

$P_{\text{m}\text{a}\text{x}}=$

i

$$ N