Page 3 - Libro de Fisica

⇒ + − 40

C*Sen58 + C*Sen58 = 40

B 2C*Sen58 = 40
2C*0,84 = 40
C
1,69*C = 40
Bz
C = 40/1,69
Cz
C = 23,58 Lb C = B

= 0 y ⇒ y − By = 0
D Cy = By

C*Cos58*Cos37 = B*Cos58*Cos37
W
23,58*0,52*0,8 = 23,58*0,52*0,8

10 Lb = 10 Lb

x ⇒ D − Cx − Bx = 0

C = B Cz = C*Sen58 D - C*Cos58*Sen37 - B*Cos58Sen37 = 0

-1
Tan (3/4)= 37° Cxy = C*Cos58 D - 23,58*0,52*0,6 - 23,58*0,52*0,6 = 0
D – 7,5 – 7,5 = 0
-1
Tan (8/5)= 58° Cx = Cxy*Sen37 Tensiones de los Cables D – 15 = 0
Cx = C*Cos58*Sen37 B = 23,58 Lb D = 15 Lb

C = 23,58 Lb
Cy = Cxy*Cos37 D = 15 Lb

Daniel Caro Cx = C*Cos58*Cos37