$($a$)$ Determine the reactions at A and $E$ if $P=690N.$ 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 $P=690N,$

$A_x=$

N

$A_y=$

i

N

$E_x=$

i

:

N