You will need

- stopwatch, protractor, tape measure or range finder, speedometer

Instruction

1

In the most General case, to determine the linear velocity of a body in uniform motion, measure the length of the path (the lines on which the moving body) and divide by the time it took to pass this way v=S/t. However, non-uniform linear motion

**speed**in a given time, determine by means of a speedometer or a special radar.2

When a body moves on a circle it has an angular and linear velocity. To measure the angular velocity, measure the Central angle which describes the body around the circumference for a certain period of time. For example, measure the time during which the body describes half of a circle, in this case the Central angle is equal to π radians (180º). Divide this angle in the time it took the body to undergo a semi-circle, and will receive the angular

**velocity**. If you know the angular**velocity**of the body, then its linear**speed is**equal to the product of the angular velocity, the radius of the circle along which the body moves, which measure a tape measure or rangefinder v=ω•R.3

Another method of determining the linear speed of a body moving in a circle. Using the stopwatch measure the time of a full revolution of the body around the circumference. This time is called the period of rotation. Rangefinder or a tape measure, measure the radius of the circular path on which the moving body. Calculate the linear

**speed**by dividing the product of the radius of the circle and the number of 6.28 (circumference) at the time of her passing v=6,28•R/t.4

If you know the centripetal acceleration, which acts on a body moving on a circle with constant

**speed**u, additionally measure its radius. In this case, the linear**speed**of a body moving on a circle is equal to the square root of the product of the centripetal acceleration at the radius of the circle.