采用整体法应用牛顿第二定律来解题时,不少资料都默认系统中各物体的运动状态要一致。实际上状态不一致同样可以应用,而且解法简洁明了。不但对直线适用,对曲线运动同样适用。灵活掌握整体法,会提高解题速度、减少失误。 The use of the overall law of Newton’s second law to solve problems, many of the default data in the system of the state of motion of the objects to be consistent. In fact, inconsistent state can also be applied, but the solution is concise. Not only for the straight line, the same applies to the curve movement. Flexibility in mastering the whole law will speed up problem solving and reduce errors.