$($a$)$ Determine the reactions at A and $E$ if $P=670N.$ 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 $P=670N,$