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Force 𝐹1F 1​ : Magnitude of 10 N acting at an angle of 30∘30 ∘ from the positive x-axis.Force 𝐹2F 2​ : Magnitude of 15 N acting at an angle of 120∘120 ∘ from the positive x-axis.

Question

Force 𝐹1F 1​ : Magnitude of 10 N acting at an angle of 30∘30 ∘ from the positive x-axis.Force 𝐹2F 2​ : Magnitude of 15 N acting at an angle of 120∘120 ∘ from the positive x-axis.

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Solution

Claro, aquí tienes la respuesta paso a paso:

  1. Descomposición de las fuerzas en componentes x e y:

    Para la fuerza F1 F_1 :

    • Magnitud: 10 N
    • Ángulo: 30°

    Componentes: F1x=10cos(30)=1032=538.66N F_{1x} = 10 \cos(30^\circ) = 10 \cdot \frac{\sqrt{3}}{2} = 5\sqrt{3} \approx 8.66 \, \text{N} F1y=10sin(30)=1012=5N F_{1y} = 10 \sin(30^\circ) = 10 \cdot \frac{1}{2} = 5 \, \text{N}

    Para la fuerza F2 F_2 :

    • Magnitud: 15 N
    • Ángulo: 120°

    Componentes: F2x=15cos(120)=15(12)=7.5N F_{2x} = 15 \cos(120^\circ) = 15 \cdot \left(-\frac{1}{2}\right) = -7.5 \, \text{N} F2y=15sin(120)=1532=7.5312.99N F_{2y} = 15 \sin(120^\circ) = 15 \cdot \frac{\sqrt{3}}{2} = 7.5\sqrt{3} \approx 12.99 \, \text{N}

  2. Suma de las componentes de las fuerzas:

    Componentes en x: Fx=F1x+F2x=8.66+(7.5)=1.16N F_x = F_{1x} + F_{2x} = 8.66 + (-7.5) = 1.16 \, \text{N}

    Componentes en y: Fy=F1y+F2y=5+12.99=17.99N F_y = F_{1y} + F_{2y} = 5 + 12.99 = 17.99 \, \text{N}

  3. Magnitud de la fuerza resultante:

    Fresultante=Fx2+Fy2=(1.16)2+(17.99)20.134+323.64323.77417.99N F_{\text{resultante}} = \sqrt{F_x^2 + F_y^2} = \sqrt{(1.16)^2 + (17.99)^2} \approx \sqrt{0.134 + 323.64} \approx \sqrt{323.774} \approx 17.99 \, \text{N}

  4. Ángulo de la fuerza resultante:

    θ=tan1(FyFx)=tan1(17.991.16)tan1(15.51)86.2 \theta = \tan^{-1}\left(\frac{F_y}{F_x}\right) = \tan^{-1}\left(\frac{17.99}{1.16}\right) \approx \tan^{-1}(15.51) \approx 86.2^\circ

Por lo tanto, la fuerza resultante tiene una magnitud de aproximadamente 17.99 N y está dirigida a un ángulo de aproximadamente 86.2° desde el eje x positivo.

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