论文部分内容阅读
参赛标志“有趣的数学”系列竞赛活动由中学生数理化(初中)杂志社携手播睿智教育·王老师数学学校主办.活动内容由王老师数学学校提供,每期都会设置相关的题目,同学们可以在信封上贴上参赛标志,把答案寄郑州市金水区农业路60号附2号3楼播睿智教育·王老师数学学校王老师收,邮编:450000.电子邮箱:brzedu001@126.com.QQ群:52668157.网址:http://www.brzedu.com.同学们用锤钉过钉子没有?下面就让董老师带我们一起去体验一下吧.如图1,用锤子以相同的力将铁钉锤入木块,随着铁钉的深入,铁钉所受的阻力也越来越大.当铁钉进入木块部分长度足够时,每次
Competition Logo “Fun Math” series of competitions are organized by the junior high school physics and chemistry (junior high) magazine co-broadcast wisdom education, Wang teacher mathematics school. Activities provided by Wang teacher mathematics school, each period will set the relevant topics, classmates We can affix the entry sign on the envelope and send the answer to No. 3, No.2 Building, No. 2, Agricultural Road, Jinshui District, Zhengzhou City Wang Zhi-ru Education, Wang Mathematics School, No. 450000 E-mail: brzedu001@126.com .QQ group: 52668157. Website: http://www.brzedu.com. Students did not use the nail nails hammer? Here let Tung teacher take us to experience it. As shown in Figure 1, with a hammer with the same force The nails hammer into the wood, with the depth of nails, nails also suffered increasing resistance.When the nail into the wood part of the length of each time, each time