14.18 Chapter 2. Second order differential equations. Section 2.11, Differential equations with discontinuous right-hand sides. Excercises page 243

14.18.1 problem 1
14.18.2 problem 2
14.18.3 problem 3
14.18.4 problem 4
14.18.5 problem 5
14.18.6 problem 6
14.18.7 problem 7
14.18.8 problem 8
14.18.9 problem 9