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3-4. By the method of section, compute the bar forces in the lettered bars of the trusses shown in Fig. 3-36. 12 ft ▼20* 5 at 16 ft 80 ft 20 (a)

3-4. By the method of section, compute the bar forces in the lettered bars of the trusses shown in Fig. 3-36. 12 ft ▼20* 5 at 16 ft 80 ft 20 (a)

Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter2: Axially Loaded Members
Section: Chapter Questions
Problem 2.8.3P
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3-4. By the method of section, compute the bar forces in the lettered bars of the trusses shown in Fig. 3-36. 12 ft V20* 20* 5 at 16 ft = 80 ft (a) a 24 ft 10 10 10% 6 at 15 ft = 90 ft (b) Iso tso tsot f s* so* so* 25 ft 5 ft -2 ft 6 at 25 ft = 1S0 ft (c) 10 b, 18 ft 18 ft 5 at 18 ft = 90 ft (d) 15ft 15 ft 4 at 20 ft = 80 ft (e) Fig. 3-36
Transcribed Image Text:3-4. By the method of section, compute the bar forces in the lettered bars of the trusses shown in Fig. 3-36. 12 ft V20* 20* 5 at 16 ft = 80 ft (a) a 24 ft 10 10 10% 6 at 15 ft = 90 ft (b) Iso tso tsot f s* so* so* 25 ft 5 ft -2 ft 6 at 25 ft = 1S0 ft (c) 10 b, 18 ft 18 ft 5 at 18 ft = 90 ft (d) 15ft 15 ft 4 at 20 ft = 80 ft (e) Fig. 3-36
3-3. Determine the bar force in each member of the trusses shown in Fig. 3-35 by the method of joint. 20 kN 80 kN 30° 50 kN 1.2 m 3.6 m 1,8 m 20 kN 2.4 m 2.4 m 2 at 4.8 m = 9.6 m (b) (a) 20 kN 30 kN 5 m 30 kN 30 kN 5 m 4 m 5 m to B 2 m 3 m m 3 m 4 m 4 m (c) (d) 3 at 3 m = 9 m 2 at 6 m = 12 m |- 2 m 6 m 2 m 3 m 50 kN () 20 kN (e) Fig. 3-35 E E E
Transcribed Image Text:3-3. Determine the bar force in each member of the trusses shown in Fig. 3-35 by the method of joint. 20 kN 80 kN 30° 50 kN 1.2 m 3.6 m 1,8 m 20 kN 2.4 m 2.4 m 2 at 4.8 m = 9.6 m (b) (a) 20 kN 30 kN 5 m 30 kN 30 kN 5 m 4 m 5 m to B 2 m 3 m m 3 m 4 m 4 m (c) (d) 3 at 3 m = 9 m 2 at 6 m = 12 m |- 2 m 6 m 2 m 3 m 50 kN () 20 kN (e) Fig. 3-35 E E E
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