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高中物理运动学中,经常遇到相互牵连的两个或多个运动,运动参量之间的关系有时很难确定,利用微量法则很容易确定。微量位移法(Δs法)即:取极短时间Δt→0时,任何运动在此极短时间内的运动均可认为是匀速直线运动,因此很容易画出极短时间内的位移关系。
In high school physics kinematics, two or more movements that are implicated in one another are often encountered. The relationship between the movement parameters is sometimes difficult to determine, and the use of the micro-law is easy to determine. The micro-displacement method (Δs method) means that when a very short time Δt → 0, the motion of any motion in this extremely short period of time can be regarded as a uniform linear motion, so it is easy to draw the displacement relationship in a very short period of time.