What is angular velocity and what is linear velocity

What is angular velocity and what is linear velocity

angular velocity
The radian that connects the radius of a moving particle and the center of a circle turns in unit time is called "angular velocity". The unit of angular velocity is radians per second, which is read as radians per second. It is a physical quantity that describes the speed and direction of rotation of an object or a particle around another particle. The time change rate of angular displacement of an object is called instantaneous angular velocity (also known as instantaneous angular velocity), and the unit is radians, The direction is determined by the right-hand screw rule. For uniform circular motion, the angular velocity is a constant, which can be expressed by the ratio of the angular displacement Δ θ and the corresponding time Δ t of the moving object and the center line
Linear velocity
The velocity of any point of a rigid body in circular motion to a fixed axis is called "linear velocity". Its general definition is the instantaneous velocity of a particle (or points on an object) in curvilinear motion (including circular motion). Its direction is along the tangent direction of the motion orbit, In uniform circular motion, the linear velocity is equal to the ratio of the arc length (s) through which the moving particle passes and the time spent (△ T). That is, v = s / △ t, In uniform circular motion, although the magnitude of linear velocity does not change, its direction changes all the time. The relationship between linear velocity and angular velocity is v = ω R. the unit of linear velocity is m / s