This book adds a computational dimension to introductory physics mechanics course, and is intended to accompany the textbook and other course materials for that course. It uses the programming language VPython in the browser-based GlowScript environment. It starts with simple computing and physics examples and move to more sophisticated topics in succeeding chapters. Computational topics include Position vs. Time Graphs, use of vectors, plotting motion of objects, and programming skills such as the cross product. Physics topics include the kinematic equations, torque, angular momentum, projectile motion of a body, the law of universal gravitation, and gravitational assist. The entire work as well as individual chapters and accompanying materials are available for download below.