【转帖】一堂物理课的启示

前车之鉴

<span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">上物理课时</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师给我们带来了几件小东西</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">木板</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">木块</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">小车</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">细绳</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">滑轮等</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">关于</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">&lt;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">力学</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">&gt;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">这一章</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">我们研究得比较深了</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">今天请大家做个实验</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">说着老师将木板搭在木块上</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">形成一个斜面</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">小车和细绳</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">滑轮放在一边</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">现在看看谁能用最省时</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">最省力的办法</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">把小车弄到斜面上去</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">?&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">这像个智力题</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">看似简单</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">却暗含玄机</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">大家盯着讲台</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">开动脑筋</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">商量着怎样将小车弄上去</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">过了一会同学甲举起手</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">将绳子栓住小车</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">一头绕在滑轮山可以省一半力</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师笑着请他上台示范</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">甲忙了好一阵</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">成功了</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">不错</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">那么还有谁能想出更省时</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">省力的办法</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">?&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">同学乙举起手</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">能不能不用滑轮</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">?&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">可以</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">于是乙上台直接将绳子栓住小车</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">轻轻拉上斜面</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">同学们都笑了</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">很好</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">这的确是个办法</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">那么还有更好的主意吗</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">?&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">大家在台下讨论的很热烈</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">奇思怪想迭出</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">但大多因为工具不够用而作罢</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">例如同学丙认为</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">只要一根弹簧</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">一下子将小车弹上斜面就行了</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">眼看大半堂课过去了</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">没人再想出更好的办法</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">那好吧</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">我来给大家一个参考答案</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">......</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">这个实验是我咋天看了一则幽默故事才想起来的</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">故事说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">普通人根据形状就能区分手掌与脚掌</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">而专家却要根据皮肤的纹理</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">气味</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">经过认真研究</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">仔细对比</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">才能区分</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">......&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">同学们笑得很欢</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师说</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">:&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">当知识成为限制我们思维的负重时</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">它就从根本上失去了意义</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">不再是力量</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">而是阻力</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">关于这个实验</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">......&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">老师一把抓起小车</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">,</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">随手直接放到了斜面上</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">.&quot;</span><span style="FONT-SIZE: 10.5pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial"><font face="宋体">答案就是这个</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial">&quot;(</span>

zlm2002

培养思维让孩子大胆的把自己的想法说出来.