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传送带问题在物理题目中经常会见到,这类问题由于涉及到物体的相对运动所以题目有一定的难度,因而不少学生经常解错,其错误原因主要是没有注意到题目中的陷阱。现作初步探讨如下:一、受力分析中相对性陷阱例1.质量为0.10kg的物块随同水平传送带一起以3m/s的速度做匀速运动。如图1所示,已知最大静摩擦力为0.02N,求物块在运动中所需力的大小。
Conveyor belt problems are often seen in physical topics. Such problems have a certain degree of difficulty because of the relative movement of objects. Therefore, many students often make mistakes. The main reason for their errors is that they do not notice the traps in the topics. The preliminary discussions are as follows: 1. Relativity traps in stress analysis Example 1. Mass with a mass of 0.10 kg moves at a uniform velocity of 3 m/s along with a horizontal conveyor belt. As shown in Fig. 1, the maximum static friction force is 0.02N, and the force required for the motion of the block is determined.