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1 正确区分两种力:保守力与耗散力保守力做功与路径无关,只取决于始、末位置。因此保守力沿任意闭合路径一周,做功为零,常见的有万有引力、重力等。耗散力做功与实际路径有关,所做的功取决于这两点间的具体路径。具体计算为力与路程的乘积,常见有摩擦力等。例 以初速度v0 竖
1 Correctly distinguish between two forces: Conservative and Dissipative Conservative power does not depend on the path, but depends only on the starting and ending positions. Therefore, Conservative forces follow an arbitrary closed path for one week and do zero work. Common gravity and gravity are common. Dissipative power is related to the actual path, and the work done depends on the specific path between these two points. The specific calculation is the product of force and distance. Commonly there are friction and so on. Example Vertical velocity v0