In these solutions we have generally omitted false leads which students may follow before hitting on the right track. Consequently, some of the solutions are deceptively simple. Although the problems after each chapter are ordered roughly in difficulty, this is not strictly followed. We urge the instructor to try each problem for himself before assigning it.
It is invaluable for the students to see correctly-worked solutions to the problems. If desired, the solutions in the manual can be reproduced for classroom use. However, our experience is that having the solutions on hand prematurely offers an irresistible temptation; it is essentially impossible for students to forgo checking their progress before having made a maximum effort. For this reason we recommend that the solution manual not be made generally available to students.
Daniel Kleppner was an American physicist who was the Lester Wolfe Professor Emeritus of Physics at Massachusetts Institute of Technology (MIT) and co-founder and co-director of the MIT-Harvard Center for Ultracold Atoms. His areas of science included atomic, molecular, and optical physics, and his research interests included experimental atomic physics, laser spectroscopy, and high precision measurements. Together with Robert J. Kolenkow, he authored a popular textbook An Introduction to Mechanics for advanced students.