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作为几何图形,圆不仅有很多重要的数学性质,如相交弦定理、切割线定理、同弧上的圆心角与圆周角的大小关系等,而且还有一些重要的物理结论.在解答物理问题时,如果灵活应用有关圆的数学性质和物理结论,可化繁为简,提高解题效率.一、运动等时圆对于竖直平面内半径为的圆,质点从圆上的任一点由静止开始沿光滑直轨道运动到最低点所用的时间都相等,与轨道的倾斜程度和长度都无关,只与圆的半径有关,即等于质点从
As a geometric figure, a circle not only has many important mathematical properties, such as the intersection of string theory, cutting line theorem, the same angle and the angle of the circle on the angle with the arc size, etc., but also some important physical conclusions.In the solution to physical problems , If the flexible application of the mathematical properties of the circle and the physical conclusion, can simplify, improve the efficiency of problem solving .One, motion isochronous Circle for the radius of the vertical plane of the circle, the particle from any point on the circle from the beginning The time it takes for a smooth, straight orbit to reach the lowest point is equal, regardless of the degree or length of the orbit, and is only related to the radius of the circle,