you need
  • stopwatch, a protractor, tape measure or range finder, speedometer
In the general case, to determine the linear velocity of a body in uniform motion, measure the length of the path (the line along which the body moves) and divide it by the time that is needed to overcome the path v = S / t.When non-uniform motion linear speed at a given time determined by means of a speedometer or a special radar.
When a body moves in a circle it has angular and linear velocity.For the measurement of the angular velocity, measure the central angle, which describes the body in a circle for a ce
rtain period of time.For example, to measure time during which the body describes a half circle, in this case, a central angle equal to π radians (180º).Divide this angle in the time it took to pass half the circumference of the body, and get the angular velocity of .If a known angular velocity body, its linear velocity , equal to the product of the angular velocity by the radius of the circle along which the body moves, which is a tape measure or rangefinder • ω = v R.
Another method for determining the linear velocity of a body moving in a circle.Using a stopwatch, measure the time the full turn around the circumference of the body.This time is called the rotation period.Rangefinder or a tape measure to measure the radius of the circular path on which the moving body.Calculate the linear speed , dividing the product of the radius and the circumference of 6.28 (circumference) at the time of its passage v = 6,28 • R / t.
If you know the centripetal acceleration that acts on every body moving in a circle at a constant speed yu, an additional measure its radius.In this case, the linear velocity of body moving in a circle is equal to the square root of the product of the centripetal acceleration in the radius of the circle.