- #1
wnvl1
- 2
- 0
- Homework Statement
- Find the forces in hinches B, C and D.
- Relevant Equations
- Sum forces = 0 and sum torques = 0
First subsystem:
$$C_x + F_{DE} \cos(45) = 0$$
$$C_y + F_{DE} \sin(45) + 20= 0$$
$$F_{DE} \sin(45) \times 25 + 20 \times 150= 0$$Second subsystem:
$$B_x - C_x = 0$$
$$B_y - C_y - A_y - 20= 0$$
$$-F \times 150 + A_y \times 60 - C_x \times 30 = 0$$Third subsystem:
$$-B_x - F_{DE} \cos(45) = 0$$
$$A_y -B_y - F_{DE} \sin(45)= 0$$
$$-A_y \times 60+ F_{DE} \sin(45) \times 55 = 0$$Problem is that I have 9 equations and only 6 unknwowns.
$$C_x + F_{DE} \cos(45) = 0$$
$$C_y + F_{DE} \sin(45) + 20= 0$$
$$F_{DE} \sin(45) \times 25 + 20 \times 150= 0$$Second subsystem:
$$B_x - C_x = 0$$
$$B_y - C_y - A_y - 20= 0$$
$$-F \times 150 + A_y \times 60 - C_x \times 30 = 0$$Third subsystem:
$$-B_x - F_{DE} \cos(45) = 0$$
$$A_y -B_y - F_{DE} \sin(45)= 0$$
$$-A_y \times 60+ F_{DE} \sin(45) \times 55 = 0$$Problem is that I have 9 equations and only 6 unknwowns.