Linear call the speed with which the body moves on any trajectory. With the known length of a trajectory and time for which it was passed find linear speed on length relation at the right time. Linear speed of the movement on a circle is equal to the work of angular speed not its radius. Also use other formulas for determination of linear speed. It can be measured by a speedometer.
It is required to you
- stop watch, angle meter, roulette or range finder, speedometer
Instruction
1. In the most general case, for determination of linear speed of a body at uniform motion, measure the trajectory length (on which line the body moves) and divide into time which was required to cover this distance of v=S/t. At non-uniform motion at present of time determine linear speed by a speedometer or the special radar.
2. At the movement of a body on a circle is available for it angular and linear speeds. For measurement of angular speed, measure the central corner which describes a body on a circle for a certain period. For example, measure time for which the body describes a half of a circle, in this case the central corner is equal π a radian (180º). Divide this corner for a while which was required to a body to pass a half of a circle, and receive angular speed. If the angular speed of a body, then its linear speed is known, is equal to the work of angular speed, on the radius of a circle on which the body which measure by a roulette or a range finder of v=ω\moves • R.
3. One more way of determination of linear speed of the body moving on a circle. By means of a stop watch measure time of a whole revolution of a body on a circle. This time is called the rotation period. Measure by a range finder or a roulette the radius of a circular trajectory on which the body moved. Calculate linear speed, having divided the work of radius of a circle and number 6.28 (circle length) for the period of its passing of v=6.28 • R/t.
4. If centripetal acceleration which affects each body moving on a circle with a constant speed is known measure in addition its radius. In this case the linear speed of the body moving on a circle is equal to a root square of performing centripetal acceleration on circle radius.