Question

Ajutati ma ca habar nu am, ofer 100 puncte

Answer 1

$R_{x}$ = $F_{1x}$ - $F_{2}$

$F_{1x}$ = sin60°x$F_{1}$ = √3/2 x 12 = 6√3 N

$R_{y}$ = $F_{1y}$ - $F_{3}$

$F_{1y}$ = cos60°x$F_{1}$ = 1/2 x 12 = 6 N

$R_{x}$ = 6√3 - 4 N

$R_{y}$ 6 - 8 = -2 N

R = √$R_{x}$²+$R_{y}$²+2$R_{x}$$R_{y}$xcos90°