Concept of average speed is average characteristic of speed of a body (particles, etc.) during its passing. We still studied it at school. Average speed - not a difficult concept, but the arising problems at the solution of tasks on this subject, demand a judicious explanation and understanding.
Instruction
1. Let's begin to argue from the fact that average speed has two concepts: - traveling speed; - average speed on movement. Let's sort each of them.
2. If S is the passable way any body, and t is time which passed this object, then the average speed is calledof size, equal to the relation of a way at the right time. And it is average (traveling) speed. At first sight simplicity and brevity of definition hides some nuances. It is necessary to remember that time it is necessary to consider everything during passing from Paragraph A to Paragraph B. Even if there were stops, the spent time all the same is fixed. Undertakes in for example, in the opposite direction, and then again continued a way. The passable distance is considered together with deviations. Average speed as it is accepted, is calculated in standard units - km/h; m/s, etc.
3. Average speed on movement is also the movement relation to perfect time, but size this already already vector. The cunning of this size is that if the body passed some way, and then returned on a starting point, then average speed will be equals to zero value.