Many students have uploaded their solved Kibble problems to GitHub. Search: kibble-classical-mechanics-solutions . You will find LaTeX documents and Jupyter notebooks. —many are open-source.
Chegg has step-by-step solutions for Kibble’s 5th edition. However, the quality is inconsistent. Some solutions are wrong; others skip crucial steps. Use Chegg only to check your final answer, not to learn. Tom Kibble Classical Mechanics Solutions Manual
The official solutions manual (often circulating in PDF form, though published legally by Imperial College Press/World Scientific) provides step-by-step solutions to the majority of the problems in Classical Mechanics (5th and 6th editions). Typically, it covers: Many students have uploaded their solved Kibble problems