Question

What is the difference between rotational motion and rotational dynamics?

Answer 1

Rotational motion, sometimes called rotational kinematics, is the study of rotation as a function of time and reference frame, without regard to what causes the rotation. It deals with such things as angular orientation, angular velocity, and angular acceleration; and their relationships to linear position, linear velocity, linear acceleration, centripetal acceleration, etc.

Rotational motion, sometimes called rotational kinematics, is the study of rotation as a function of time and reference frame, without regard to what causes the rotation. It deals with such things as angular orientation, angular velocity, and angular acceleration; and their relationships to linear position, linear velocity, linear acceleration, centripetal acceleration, etc.Rotational dynamics is the study of the causes of rotational motion. It introduces the concepts of torque (“twisting force”) and moment of inertia (mass distribution), and how these affect angular acceleration, etc. It also introduces concepts like angular momentum, precession, etc.

Rotational motion, sometimes called rotational kinematics, is the study of rotation as a function of time and reference frame, without regard to what causes the rotation. It deals with such things as angular orientation, angular velocity, and angular acceleration; and their relationships to linear position, linear velocity, linear acceleration, centripetal acceleration, etc.Rotational dynamics is the study of the causes of rotational motion. It introduces the concepts of torque (“twisting force”) and moment of inertia (mass distribution), and how these affect angular acceleration, etc. It also introduces concepts like angular momentum, precession, etc.Both of these are considered part of physics. Learning (some) rotational kinematics is a prerequisite to learning rotational dynamics.