When a rigid body is in a planar motion, all its particles move along paths that remain at a constant distance from a specified plane. The planar body motion can be categorized into three different types. Consider a subway train consistently moving along its track, always maintaining its direction. This is an instance of rectilinear translation, where the paths of any two points on the body are parallel lines. A roller coaster, smoothly navigating along its winding tracks while preserving its orientation, is an example of curvilinear translation. Here the motion paths trace curved lines that are equidistant. Now, consider a spinning top rotating around its axis. This is an instance of rotation about a fixed axis, where all particles of the rigid body, except those on the axis of rotation, follow circular paths. A general planar motion is a combination of translational and rotational motion. A frisbee is an example that shows the general planar motion. As it flies, it spins while moving forward, maintaining its rotational axis perpendicular to the rotational plane.