This paper examines the use of the 3-D virtual world Second Life to explore basic mechanics in physics. In Second Life, students can create scripts that take advantage of a virtual physics engine in order to conduct experiments that focus on specific phenomena. The paper explores two particular examples of this process: (1) the movement of an object under the influence of gravity, and (2) the movement of an object using simple forces. Findings suggest that Second Life offers a flexible and wide range of possibilities for simulations in mechanics; paradoxically, however, the environment also presents challenges for effective use by instructors and learners. Any implementation making use of the Second Life application requires technical knowledge of the system and a wide range of pedagogical and learner skills related to building, scripting, and educational design.