Circular running line speed online calculator

The speed of the circular motion can be measured by the
ratio of the arc length through which the object
passes and the time used. If the object moves from M to N,
a point t passes through point A. In order to
describe the speed of movement through the vicinity of point
A, it can be taken from this moment for a short
period of time Δt, during which the object moves from A to B,
and the arc length passed is ΔL. The ratio
△ l / Δt reflects the speed of the object movement, called
the line speed, expressed by v, that is, v =
△ L / Δt. The line speed also has an average value and an
instantaneous value. If the time interval taken
is very small, the instantaneous line speed is obtained.

Note that when Δt is small enough, the arc AB is almost a
straight line, and the length of the AB arc is
almost the same as the length of the AB segment. At this time,
Δl is the displacement of the object from A
to B. Therefore, the v here is actually the instantaneous
speed in linear motion, but it is now used to describe
the circular motion.
Line velocity is a vector, with size and direction, an object
that makes a circular motion, its linear velocity
direction changes momentarily, and always points to the
tangent direction of the point.

Peripheral speed calculator:

Line speed: V = 2PIr/T

Here:

r = radius

T = time period