我们所熟知的测量动摩擦因数的实验 ,是用弹簧秤在木板上匀速拉动木块 ,但“匀速”往往不易做到 ,误差较大 .现介绍一种简单易行 ,便于操作 ,而且可以改变不同参量的巧妙方法 .操作 :如图 1所示 ,弹簧秤一端固定 ,另一端钩住方木块 ,方木块下面是一个长木板 ,拉动长木板 ,待弹 We are familiar with the measurement of dynamic friction factor experiment, the spring scale is used to uniformly pull the wood on the board, but the “uniform speed” is often not easy to do, the error is larger. Now introduce a simple and easy to operate, and can change different parameters Operation: As shown in Figure 1, one end of the spring balance is fixed, the other end hooked square wooden block, below the square block is a long wooden board, pull the long wooden board, to be fired