１对“研究滑动摩擦力”实验的一点改进在初二物理“研究滑动摩擦力的大小跟哪些因素有关”的实验中，用手拉弹簧秤做匀速运动很不容易，任何一点造成不匀速的因素都会引起弹簧秤的指数发生忽大忽小的变化。为此，我对实验做了如下改进（如图１）。把木块放在一个较长的平板 1. A little improvement on the “study of sliding friction” experiment In the second day of the physics experiment, “study the factors related to the size of the sliding friction,” it is not easy to do a uniform movement with a hand-held spring scale, causing uneven velocity at any point. Factors will cause the sudden change in the index of the spring balance. For this reason, I made the following improvements to the experiment (Figure 1). Put a wooden block on a long slab