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传送带问题综合了摩擦力、相对运动、能量关系等知识,是高中物理解题的一个难点,在高考中也容易成为难题和易错题。教师要注重例题选择,抓住解题的基本思路、澄清学生疑惑点,最终使学生掌握解决传送带问题的关键,下面就从三个例题来说明。例1:如图所示,顺时针转动的传送带水平部分长为L,传动速率为v,在其左端无初速度放一小木块,若木块与传送带间的动摩擦因数为μ,则木块从左端运动到右端的时间可能的是
Conveyor belt problem combines friction, relative movement, energy relations and other knowledge, high school physics problem solving a difficult point in the college entrance examination is also easy to become a problem and error-prone. Teachers should pay attention to the choice of examples, seize the basic idea of solving problems, clarify students’ doubts, and finally enable students to master the key to solve the problem of the conveyor belt, the following three examples to illustrate. Example 1: As shown in the figure, the horizontal part of the conveyor belt rotating clockwise is L and the transmission speed is v, a small block is placed at the left end without any initial velocity. If the dynamic friction coefficient between the block and the belt is μ, It is possible that the left end moves to the right end of the time