Page 3 - libro de fisica

⇒ + − 40

C*Sen58 + C*Sen58 = 40
2C*Sen58 = 40

B 2C*0,84 = 40
1,69*C = 40
C
C = 40/1,69
Bz
C = 23,58 Lb C = B
Cz = 0 y ⇒ y − By = 0

Cy = By
C*Cos58*Cos37 = B*Cos58*Cos37
D 23,58*0,52*0,8 = 23,58*0,52*0,8

10 Lb = 10 Lb
W

x ⇒ D − Cx − Bx = 0

D - C*Cos58*Sen37 - B*Cos58Sen37 = 0

D - 23,58*0,52*0,6 - 23,58*0,52*0,6 = 0
D – 7,5 – 7,5 = 0
C = B Cz = C*Sen58 D – 15 = 0

-1
Tan (3/4)= 37° Cxy = C*Cos58 Tensiones de los Cables D = 15 Lb

-1
Tan (8/5)= 58° Cx = Cxy*Sen37 B = 23,58 Lb
Cx = C*Cos58*Sen37 C = 23,58 Lb

D = 15 Lb
Cy = Cxy*Cos37
Daniel Caro Cx = C*Cos58*Cos37