Preface; 1. Introduction to the mechanical universe; 2. The law of falling bodies; 3. The language of nature: derivatives and integrals; 4. Inertia; 5. Vectors; 6. Newton's laws and equilibrium; 7. Universal gravitation and circular motion; 8. Forces; 9. Forces in accelerating reference frames; 10. Energy: conservation and conversion; 11. The conservation of momentum; 12. Oscillatory motion; 13. Angular momentum; 14. Rotational dynamics for rigid bodies; 15. Gyroscopes; 16. Kepler's laws and the conic sections; 17. Solving the Kepler problem; 18. Navigating in space; 19. Temperatures and the gas laws; 20. The engine of nature; 21. Entropy; 22. The quest for low temperature; Appendix A. The international system of units; Appendix B. Conversion factors; Appendix C. Formulas from algebra, geometry, and trigonometry; Appendix D. Astronomical data; Appendix E. Physical constraints; Selected bibliography; Index.