Equilibre D 39un Solide Soumis A 3 Forces Exercice Corrige Pdf Exclusive ((free)) Official

Reaction from wall: ( R_W ) → horizontal only (smooth wall), pointing right.

$\vecF_1$ (20 N, $30^\circ$) $\vecF_2$ (30 N, $60^\circ$) $\vecF_3$ (50 N, verticale) Reaction from wall: ( R_W ) → horizontal

to the vertical, each supporting wire must withstand a tension of approximately . Forces: Horizontal: T cos30°

Conclusion : Pour l’équilibre, F3 doit avoir une intensité ≈ 78.1 N et une direction passant par O, orientée vers le sud-ouest formant ≈ 33.7° sous l’horizontale vers la gauche. : On construit un polygone fermé en plaçant

Forces: Horizontal: T cos30°? Wait T direction: 150° from +x → cos150° = -cos30° = -0.866, sin150° = 0.5. So Tx = T cos150° = 100 × (-0.866) = -86.6 N (leftward) Ty = T sin150° = 100 × 0.5 = 50 N (upward)

The sum of moments about any point is zero (automatically satisfied if forces are concurrent).

: On construit un polygone fermé en plaçant les vecteurs forces bout à bout à une échelle choisie. Si le polygone se referme (forme un triangle), l'équilibre est vérifié.

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