Answer
$F_v = 30~N$
Work Step by Step
To find $F_v$, we can consider the vertical forces:
$F_{net,y} = 0$
$F_v-F_1-F_2 = 0$
$F_v = F_1+F_2$
$F_v = 20~N+10~N$
$F_v = 30~N$
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