Dịch sang tiếng Việt
Dịch sang tiếng Việt
----- Nội dung ảnh -----
20. (II) A shop sign weighing 245 N is supported by a uniform 155-N beam as shown in Fig. 9–54. Find the tension in the guy wire and the horizontal and vertical forces exerted by the hinge on the beam.
FIGURE 9–54
Problem 20.
21. (II) A traffic light hangs from a pole as shown in Fig. 9–55. The uniform aluminum pole AB is 7.50 m long and has a mass of 12.0 kg. The mass of the traffic light is 21.5 kg. Determine (a) the tension in the horizontal mass cable CD, and (b) the vertical and horizontal components of the force exerted by the pivot A on the aluminum pole.
----- Nội dung ảnh -----
20. (II) A shop sign weighing 245 N is supported by a uniform 155-N beam as shown in Fig. 9–54. Find the tension in the guy wire and the horizontal and vertical forces exerted by the hinge on the beam.
FIGURE 9–54
Problem 20.
21. (II) A traffic light hangs from a pole as shown in Fig. 9–55. The uniform aluminum pole AB is 7.50 m long and has a mass of 12.0 kg. The mass of the traffic light is 21.5 kg. Determine (a) the tension in the horizontal mass cable CD, and (b) the vertical and horizontal components of the force exerted by the pivot A on the aluminum pole.