Chapter 5. Applications of Higher Order Equations. Exercises 5.1, page 232

68.19.1 problem 1
68.19.2 problem 2
68.19.3 problem 3
68.19.4 problem 4
68.19.5 problem 5
68.19.6 problem 6
68.19.7 problem 7
68.19.8 problem 8
68.19.9 problem 9
68.19.10 problem 10