This textbook explains the uniplanar particle motion of both constant and varying mass in a lucid and fluent manner. It also discusses the two-dimensional motion of Rigid Bodies, taking place in Cartesian and Polar Coordinates with the help of integral and differential calculus. It also provides an in-depth understanding of the dynamics of rigid bodies and particles. The book is ideal for mathematics, science and engineering degree courses. The author of the book, S.L. Loney, is a well-known mathematician and has shown his mathematical acumen when writing this book. The concepts are explained in a clear manner with examples to cement the learning of students, provided, the students have a basic understanding of calculus. The book is indeed an essential treasure trove for all engineering and science pursuers for learning and mastering the fundamentals. Key Features: Covers rotational and liner motions of particles and rigid bodies Particle and rigid dynamics explained with calculus