This classic work of mathematical physics by Euler is presented in a clear and accessible new translation by Paul Stäckel. With detailed explanations and rigorous proofs, Euler lays out the principles of classical mechanics and explores the physics of motion in great detail. A must-read for anyone interested in the history and nature of physical science. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.