Question 2: What do you mean by coincidence? It means that two things completely overlap, just like one thing, such as two pieces of paper in the same notebook, completely overlap.
Question 3: What is the meaning of plane overlap in mathematics? It can be described as two identical pieces of paper, placed on the same (smooth plane) desktop, with a distance. If the thickness of two pieces of paper is small enough, it can be regarded as a part of the desktop. If two pieces of paper are big enough, they will overlap.
Because the plane itself has no thickness, it can extend indefinitely.
Question 4: What do you mean by coincidence?
(1) has overlapping meanings. Two or more geometric figures are exactly the same in size and position, that is, when they occupy the same space, it is called overlap, also called overlap.
Meet again, meet again. Source: See the poem "Farewell to Jia Feng Jinshi" by Gao Qi in Ming Dynasty: If it overlaps, Long song must talk about it.
I hope my answer is helpful to you. If you are satisfied, please accept it. Thank you.
Question 5: What does the coincidence rate mean? The proportion of the distribution of quality characteristic values consistent with the expected value distribution to the total distribution of quality characteristic values.
Question 6: What does translation overlap mean? The surface meaning of "overlapping each other after translation" means that a line segment or a figure completely coincides with another line segment or figure in different positions after translation transformation; The essential meaning is to tell us that the two figures before and after translation transformation are congruent and can be replaced by equivalence.
Question 7: What does the coincidence point mean in the mechanical principle? Coincidence point in mechanical principle generally refers to instantaneous coincidence point. The moving point is just a reference point on the moving reference system that coincides with the moving point at the moment under investigation, and this point is called the instantaneous coincidence point of the moving point.
Significance of determining instantaneous coincidence point of moving point;
For example, the speed of passengers involved in a car is equal to the ground speed at the point where the car floor coincides with the passenger's sole (when the car moves horizontally, this speed also represents the speed of the whole car. It seems that the coincidence point is not that important).
But if the moving system is a rotating part, the skeleton of instantaneous coincidence point is very important.