在一次集体备课时,就《当代中学生报》上的一道物理单元检测题的解答对错与否,几位教师见解不一,展开了热烈的争论,原题及解答如下:如图1所示,一橡皮筋原长L0=10cm,其下端悬挂质量m=1kg的重物后,长度变为L=14cm,已知在弹性限度内,此橡皮筋的弹力与形变量符合胡克定律,取g=10m/s~2.(1)求橡皮筋的劲度系数. During a class lesson preparation, the questions on the physical unit detection questions of the Contemporary Secondary School Students were right or wrong. Some teachers disagreed and heated discussions were held. The original questions and answers are as follows: As shown in Figure 1 , A rubber band of the original length L0 = 10cm, the lower end of the hanging mass m = 1kg weight, the length becomes L = 14cm, it is known within the elastic limit, elastic and deformation of the rubber band in line with Hooke’s law, take g = 10m / s ~ 2. (1) Find the stiffness coefficient of rubber band.