General Plane Motion of Symmetric Bodies

If a body in general plane motion is symmetric with respect to the plane of motion (I_Azx = I_Ayz = 0) or if all forces act in the plane of motion, then we can simplify the equations of motion.

The following table summarizes these equations for the three types of motion studied in this chapter.

Motion	Kinetics	Kinematics
Translation
Fixed-Axis Rotation
General Plane Motion

Note that we generally need both the kinematic and kinetic relationships to solve problems.