duction All of the previous labs have dealt with systems whose centers of mass were moving from one place to another - systems undergoing translational motion. In this lab, we take a first look at systems in rotation - systems where the object is rotating about an axis. When we studied systems in translation we first focused on the kinematics of translation, i.., the study of the motion of the systems without worrying about the causes and influences of that rotation. Later we looked at dynamics, or the study of how the forces acting on a system and the mass of the system affected the motion. Similarly, for the study of rotation we will first investigate rotational kinematics, paying attention to the motion, and then we will look at some of the factors that influence rotation. For rotating objects, we can define an angular displacement, the change in angle that a line connecting a point on the object to the center of the object makes in some time interval; an angular velocity, the rate of rotation; and an angular acceleration, the time rate of change of the angular velocity. Mathematically, the relationship between these quantities is similar to the relationships between their translational analogues of displacement, velocity, and acceleration. In addition, we can connect the translational and rotational variables for rigid bodies. In this lab, we explore the relationships between these kinematic quantities. In addition, we introduce the idea of moment of inertia, which is a rotational analogue to mass. 1.1 Lab Objectives. After completing this lab and the associated homework, you should be able to: 1. Determine angular displacement, angular velocity and angular acceleration