Rotational kinematics is the branch of physics that deals with the motion of objects that are rotating or spinning. It involves studying the position, velocity, and acceleration of these objects as they move around an axis.
The main difference between rotational and linear kinematics is that rotational kinematics deals with the motion of rotating objects, while linear kinematics deals with the motion of objects in a straight line. Rotational kinematics also involves concepts such as angular velocity and angular acceleration, while linear kinematics involves linear velocity and linear acceleration.
Angular velocity is calculated by dividing the change in an object's angular displacement by the change in time. It is typically measured in radians per second (rad/s) or revolutions per minute (RPM).
Centripetal acceleration is the acceleration that an object experiences as it moves in a circular path. In rotational kinematics, this acceleration is necessary to keep the object moving in a circular path and is directed towards the center of the rotation.
Rotational kinematics has many real-life applications, including in the fields of engineering, physics, and mechanics. Examples include the motion of planets around the sun, the rotation of tires on a car, and the spinning of turbines in a power plant.