<p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s41" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; color: rgb(255, 0, 0);"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">科學(xué)原理：</span></span><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">定滑輪、動滑輪組合在一起，大家齊心協(xié)力工作，既能改變方向，又省了力氣</span></span><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">；</span></span></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s41" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; color: rgb(255, 0, 0);"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">能力培養(yǎng)：</span></span><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">能夠獨(dú)立打結(jié)，獨(dú)立手眼協(xié)調(diào)穿線、繞圈纏線</span></span></h3><p class="s236" style="line-height: 21.600000381469727px; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s41" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; color: rgb(255, 0, 0);"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">生活運(yùn)用：</span></span><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">生活中起重機(jī)就利用了很多滑輪組</span></span></h3><p class="s128" style="line-height: 1.5; text-indent: 28px; text-align: center; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">實(shí)驗(yàn)一：</span></span><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">認(rèn)識定滑輪</span></span></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">操作材料</span></span></h3><p class="s231" style="line-height: 1.5; text-align: justify; margin-left: 23px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">材料包材料：</span></span><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">滑輪組裝片、掛鉤、小鐵軸、棉線</span></span><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">；</span></span><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;"><br></span></span><br></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">操作方法</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">1</span></span><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">.</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">用短鐵棒穿過大滑輪一半的中間的圓孔；</span></span></h3><p style="line-height: 21.600000381469727px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><div class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">2.</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">將大滑輪的另一半也穿過短鐵棒，并使滑輪的兩半完全咬合；</span></span></div><p style="line-height: 21.600000381469727px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><div class="s72" style="text-indent: 21px; line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">3.</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">把裝好的大滑輪裝入支架中</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">并</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">在支架任意一頭安裝好掛鉤；</span></span></div><p class="s12" style="line-height: 21.600000381469727px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;"><br></span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">4.</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">把棉繩從滑輪中間的凹槽里穿過去，繩子一端系一個(gè)重物，另一端穿過滑輪的凹槽掛在上邊，老師提起滑輪的掛鉤，請幼兒拉住繩子一端將重物提起，感受定滑輪提重物，觀察力與物體運(yùn)動方向。</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;"><br></span></span><br></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">現(xiàn)象</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">使用定滑輪拉東西，可以把重物拉起來，但是不能省力。</span></span></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s40" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">原理</span></span></h3><p class="s167" style="line-height: 1.5; text-indent: 18px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">定滑輪不省力，但可以改變方向。</span></span></h3><p class="s57" style="line-height: 1.5; text-align: center; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">實(shí)驗(yàn)二：</span></span><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">認(rèn)識動滑輪</span></span></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">操作</span></span><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">材料</span></span></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">做好的滑輪、繩子、重物</span></span></h3><p class="s58" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">操作方法</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">1.</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">把繩子穿過滑輪中間的凹槽，將重物掛在滑輪掛鉤上，教師拿住繩子的一端，，請幼兒拉著繩子另一端將重物提起，感受用動滑輪提重物，觀察力與物體運(yùn)動方向。</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">原理</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">動滑輪省力，但不能改變方向。</span></span><br></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s94" style="line-height: 19.200000762939453px; font-size: 16px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 28.799999237060547px; font-size: 1.5em;">四、活動延伸</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">材料準(zhǔn)備</span></span></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">滑輪組材料</span></span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">包；</span></span></h3><p class="s342" style="line-height: 1.5; text-indent: -84px; text-align: justify; margin-left: 84px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">操作過程</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">1．如實(shí)驗(yàn)一的方法，將大滑輪安裝到輪軸上；</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">2．把小滑輪的任意一半也安裝到輪軸上，并且使大小滑輪咬合；</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">3．把小滑輪的另一半也安裝到齒輪上，使小滑輪兩半咬合在一起；</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><div class="s125" style="text-indent: -18px; line-height: 1.5; text-align: justify; margin-left: 39px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s228" style="line-height: 12px; font-size: 10px;">3． </span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">將一根繩子放進(jìn)兩半大滑輪中間，并卡好，打結(jié)系好；</span></span></div><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s342" style="line-height: 1.5; text-indent: -84px; text-align: justify; margin-left: 84px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">5．將繩子繞圈纏在大滑輪的凹槽上，并剩下20厘米左右長度的一段繩子；</span></span></h3><p class="s342" style="line-height: 1.5; text-indent: -84px; text-align: justify; margin-left: 84px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s342" style="line-height: 1.5; text-indent: -84px; text-align: justify; margin-left: 84px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">6．把另一根繩子卡好系在小滑輪上；</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">7．把大滑輪上的繩子穿過一片滑輪支架上方同向的一個(gè)孔，并將輪軸安裝上；</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><div class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s32" style="line-height: 12px; font-size: 10px;">8． </span><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">將小滑輪上的繩子從另一片滑輪支架上的孔，并輪軸安裝上，再將滑輪蓋安好。</span></span></div><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><br></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">9．一人拉一端繩子，看看有什么發(fā)現(xiàn)?；蛘哓Q著拉呢？</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">現(xiàn)象</span></span></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">一人拉一端時(shí)，滑輪會朝拉著纏在小滑輪上的人一端移動。當(dāng)大滑輪上纏的繩子拉到頭后，再拉回來就很困難。</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s22" style="line-height: 14.399999618530273px; font-size: 12px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">原理</span></span></h3><p class="s29" style="line-height: 1.5; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">大滑輪比較省力，小滑輪費(fèi)力，所以用大滑輪帶動小滑輪比較容易，小滑輪帶動大滑輪就不太容易</span></span><br></h3><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span style="line-height: 21.600000381469727px;"> </span></h3><p class="s67" style="line-height: 21.600000381469727px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s94" style="line-height: 19.200000762939453px; font-size: 16px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 28.799999237060547px; font-size: 1.5em;">五</span></span><span class="s94" style="line-height: 19.200000762939453px; font-size: 16px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 28.799999237060547px; font-size: 1.5em;">、</span></span><span class="s94" style="line-height: 19.200000762939453px; font-size: 16px; font-weight: bold; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 28.799999237060547px; font-size: 1.5em;">概述</span></span></h3><p class="s67" style="line-height: 21.600000381469727px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">1、科學(xué)原理</span></span></h3><div class="s82" style="text-indent: -36px; line-height: 1.5; text-align: justify; margin-left: 57px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s32" style="line-height: 12px; font-size: 10px;">（1） </span><span class="s153" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體; text-decoration: underline;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">滑輪</span></span></div><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">它是一種可以繞著中心軸連續(xù)旋轉(zhuǎn)的簡單機(jī)械。它周邊有個(gè)凹槽，繩索夾在里面，可以帶動滑輪旋轉(zhuǎn)。</span></span></h3><div class="s82" style="text-indent: -36px; line-height: 1.5; text-align: justify; margin-left: 57px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s32" style="line-height: 12px; font-size: 10px;">（2） </span><span class="s153" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體; text-decoration: underline;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">定滑輪</span></span></div><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">軸固定不動的滑輪叫定滑輪。使用定滑輪提起物品，不會省力氣，但是它可以改變方向，也就是站在下面也能把物體拉到上面。</span></span></h3><div class="s82" style="text-indent: -36px; line-height: 1.5; text-align: justify; margin-left: 57px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s32" style="line-height: 12px; font-size: 10px;">（3） </span><span class="s319" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體; text-decoration: underline;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">動滑輪</span></span></div><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">把重物掛在滑輪的下方，提起重物的時(shí)候，滑輪也跟著上升，這樣的滑輪叫動滑輪。不可以改變方向，但是省力，也就是要把東西拉到上面必須站在上邊。</span></span></h3><div class="s82" style="text-indent: -36px; line-height: 1.5; text-align: justify; margin-left: 57px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s32" style="line-height: 12px; font-size: 10px;">（4） </span><span class="s153" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體; text-decoration: underline;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">滑輪組</span></span></div><p class="s27" style="line-height: 1.5; text-indent: 24px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s19" style="line-height: 14.399999618530273px; font-size: 12px; font-family: 宋體;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">定滑輪、動滑輪組合在一起，大家齊心協(xié)力工作，既能改變方向，又省了力氣，這樣的機(jī)械裝置就叫滑輪組。</span></span></h3><p class="s67" style="line-height: 21.600000381469727px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">2、能力培養(yǎng)</span></span></h3><p class="s166" style="line-height: 1.5; text-align: justify; margin-left: 21px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">（1）認(rèn)知：認(rèn)識滑輪及動滑輪、定滑輪的特點(diǎn)及作用；</span></span></h3><p class="s166" style="line-height: 1.5; text-align: justify; margin-left: 21px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">（2）動作技能：能夠獨(dú)立打結(jié)，獨(dú)立手眼協(xié)調(diào)穿線、繞圈纏線；</span></span></h3><p class="s166" style="line-height: 1.5; text-align: justify; margin-left: 21px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">（3）情感態(tài)度：學(xué)會合作，認(rèn)真傾聽。</span></span></h3><p class="s67" style="line-height: 21.600000381469727px; text-align: justify; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s36" style="line-height: 16.799999237060547px; font-size: 14px; font-weight: bold;"><span class="bumpedFont15" style="line-height: 25.200000762939453px; font-size: 1.5em;">3、生活及運(yùn)用</span></span></h3><p class="s166" style="line-height: 1.5; text-align: justify; margin-left: 21px; font-family: -webkit-standard; font-size: 18px; white-space: normal; -webkit-tap-highlight-color: rgba(26, 26, 26, 0.301961);"><span class="s50" style="line-height: 14.399999618530273px; font-size: 12px;"><span class="bumpedFont15" style="line-height: 21.600000381469727px; font-size: 1.5em;">生活中起重機(jī)就利用了很多滑輪組</span></span></h3>