不少学生认为摩擦因数总是小于1,其理由有以下几点:(1)一般情况下,人们在搬运重物时,在地上拖着走比背在身上走省力,设重物匀速运动,因F=μmg,而Fmg,所以μ1,这是不少学生认为μ1的客观基础.(2)物理课本和一般物理参考书中所见的摩擦因数都小于1,这是不少学生认为μ1的理论 Many students believe that the friction factor is always less than 1, and the reasons are as follows: (1) Under normal circumstances, when people carry heavy objects, they drag on the ground rather than on their backs, setting a uniform movement of heavy objects. Because F = μmg, and Fmg, so μ1, which is the objective basis for many students to think μ1. (2) The friction factor seen in physics textbooks and general physical reference books is less than 1, which is considered by many students as μ1. theory