匀变速直线运动规律的核心公式有两个:速度和时间的关系式v_t=v_0+at以及位移和时间的关系式x=v_0t+1/2at~2.有了这两个基本公式,就可以根据各物理量之间的关系得到其他公式.比如位移和速度的关系式v_t~2-v_0~2=2ax和匀变速直线运动的平均速度公式v=(v_t+v_0)/2=v_(t/2).这些规律实质上是研究做匀变速直线运动物体的初速度v_0、末速度v_t、加速度a、位移x和时间t这五个量的关系.具体应用过程中,一般可先进行文字运算,得出用已知量表达未知 There are two core formulas for the law of uniform linear motion: the relationship between velocity and time v_t = v_0 + at and the relationship between displacement and time x = v_0t + 1 / 2at ~ 2 With these two basic formulas, According to the relationship between the physical quantities to get other formulas, such as the relationship between displacement and speed v_t ~ 2-v_0 ~ 2 = 2ax and uniform speed linear motion average speed formula v = (v_t + v_0) / 2 = v_ (t / 2). These laws are essentially the study of the relationship between the initial velocity v_0, the final velocity v_t, the acceleration a, the displacement x and the time t in a uniform linear moving object. , Come to know the unknown amount of known