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匀变速直线运动是直线运动中研究最多的一种运动,涉及的公式较多,且各公式间有相互联系,因此,许多题目可以一题多解,若在解题时联想比较,开阔思路,可以找到一些很简捷的解题方法,下面就通过一些实例介绍一些求解匀变速直线运动问题的常用方法。一、一般公式法一般公式法指速度、位移公式的运用,即基本规律的运用,它们均是矢量式,使用时注意方向,一般以的方向为正方向,其余与正方向相同者为正,与正方向相反者为负,在应用规律时忌死套公式.特别是涉及“刹车问题”或“追击问题”时更需谨慎。
Even speed linear motion is the most studied movement in linear motion, involving more formulas, and the formulas are interrelated, therefore, many topics can be more than one solution, if the problem-solving comparison, broaden the train of thought, You can find some very simple solution to the problem, the following through some examples to introduce some common methods for solving uniform linear motion problems. First, the general formula method The general formula method refers to the use of speed and displacement formula, that is, the application of the basic laws, they are all vector, pay attention to the direction of use, the general direction is the positive direction, the rest of the same positive as positive, Contrary to the positive direction, negative, in the application of the law avoid the formula, especially when it comes to “brake problem ” or “chase the problem ” more cautious.