51:06

8 Lesson 8 21 7 99

56:22

18 Castigliano's Theorems 1 13 2 99

54:06

27 Stability of Equilibrium 5 17 3 99

39:35

21 Virtual Work Method 2 22 2 99

38:18

19 Castigliano's Theorems 2 15 2 99

50:37

25 Stability of Equilibrium 3 10 3 99

55:22

22 Virtual Work Method 3 27 2 99

40:04

6 Lesson 6 14 7 99