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传送带是一种应用比较广泛的传送装置,以其为素材的物理题是以真实物理现象为依据的问题,它既能训练学生的科学思维,又能联系科学、生产和生活实际,是高考考查的热点,也是广大考生的难点.例1一水平浅色的长传送带上放置一煤块(可视为质点),煤块与传送带之间的动摩擦因数为μ.初始时,传送带与煤块都是静止的.现让传送带以恒定的加速度a0开始运动,当其速度达到v0后,便以此速度做匀速运动.经过一段时间,煤块
Conveyor belt is a kind of transmission device which is widely used. The physical problem with its material is based on the real physical phenomena. It not only can train students’ scientific thinking but also can relate science, production and living reality to college entrance examination Hot spots, but also the difficulty of the majority of candidates.Example 1 a horizontal light-colored long conveyor belt placed a coal block (which can be regarded as particle), the dynamic friction coefficient between the coal block and the conveyor belt is mu. Initially, the conveyor belt and the coal block Is still. Now let the conveyor belt to start a constant acceleration a0, when its speed reaches v0, it will do at this speed uniform movement .After a period of time, the coal