{"ops":[{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/4aa32da6cbabac385d30dafb58ef62f43240c45a.jpg","width":956,"height":708,"size":166793,"status":"loaded"}}},{"insert":"\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b1.sanwen.net/b_article/5dd03347e3df0f9246db5dd3c73ccf34781ccda8.jpg","width":2304,"height":1260,"size":1462826,"status":"loaded"}}},{"insert":"紅色是女生，黑色是同桌\n\n\n\n\n"},{"attributes":{"color":"#f85a54"},"insert":"“救命!這道題怎么做?。俊?#34;},{"insert":"\n"},{"attributes":{"color":"#18191c"},"insert":"“給我看看，這么簡(jiǎn)單，你做不來（震驚）你這么笨?。俊?#34;},{"insert":"\n"},{"attributes":{"color":"#f85a54"},"insert":"“好好好，我是笨蛋，教教我嘛”"},{"insert":"\n“行吧，你看啊，球剛剛離開地面，地面對(duì)球不就沒有支持力了嘛，我們把球剛剛離開地面時(shí)的所受的力分析一下（見第二張圖) F1 是木塊對(duì)球的力，F(xiàn)1sinθ 和 F1cosθ是F1的分力，懂不懂？ F2 是墻對(duì)球的支持力”\n"},{"attributes":{"color":"#f85a54"},"insert":"“F1（支持力1）sinθ和F1cosθ怎么來的？”"},{"insert":"\n“笨吶你，同位角啊!”\n"},{"attributes":{"color":"#f85a54"},"insert":"“等我看一下圖啊，哦~我懂了，繼續(xù)繼續(xù)”"},{"insert":"\n“那我繼續(xù)了阿，聽好了，這個(gè)球是平衡狀態(tài)對(duì)吧？那F1sinθ=G, F1cosθ=F2，對(duì)吧”\n"},{"attributes":{"color":"#f85a54"},"insert":"“嗯嗯”"},{"insert":"\n“接著，我們求個(gè)sinθ啊， sinθ =R-h/R，這個(gè)懂不懂？”\n"},{"attributes":{"color":"#f85a54"},"insert":"“哎？為什么阿？”"},{"insert":"\n“看一下圖阿，笨蛋!\n"},{"attributes":{"color":"#f85a54"},"insert":"“我看看OK，明白了，接下來呢？”"},{"insert":"\n“sinθ= R-h/h， 那 tanθ=R-h/根號(hào)下（R平方-（R-h)平方=R-h/根號(hào)下（R平方-R平方-h平方+2Rh)=R-h/根號(hào)下（2Rh-h平方)”\n"},{"attributes":{"color":"#f85a54"},"insert":"“對(duì)對(duì)對(duì)”"},{"insert":"\n“我們?cè)侔堰@個(gè)球和木塊當(dāng)整體分析一下，就有\(zhòng)nF2=F（其水平推力) F2又等于G/tanθ，這個(gè)懂不懂？”\n"},{"attributes":{"color":"#f85a54"},"insert":"“G=F1sinθ，F(xiàn)2cosθ……，所以tanθ=G/F2，所以F2=G/tanθ……okok，懂了!”"},{"insert":"\n“F2=G/tanθ，tanθ=R-h/根號(hào)下（2Rh-h平方)，所以，F(xiàn)2=G/（R-h/根號(hào)下（2Rh-h平方))”\n"},{"attributes":{"color":"#f85a54"},"insert":"“嗯……我看看阿，F(xiàn)2=G/tanθ=G/【R-h/根號(hào)下（2Rh-（h)平方)】=G乘根號(hào)下（2Rh-（h)平方/R-h……會(huì)了會(huì)了，阿里嘎多”"},{"insert":"\n“總算會(huì)了，累死我了，喂喂，你可別不懂裝懂阿，我這可是照著答案一點(diǎn)一點(diǎn)喂給你的，你可別全給我吐了阿”\n"},{"attributes":{"color":"#f85a54"},"insert":"“謝謝謝謝謝謝，我是真的懂了”"},{"insert":"\n“再也不想教你了，笨死了”（內(nèi)心OS:我怎么會(huì)喜歡這么笨的人啊!）\n"},{"attributes":{"color":"#f85a54"},"insert":"“切，不教就不教唄，誰稀罕”"},{"insert":"\n“得了吧你，明天搞不好又可憐兮兮得求我教你。行了，放學(xué)了都，走吧”\n"},{"attributes":{"color":"#f85a54"},"insert":"“啊，放學(xué)了？!你怎么不早點(diǎn)說，走走走，我可不想當(dāng)最后一個(gè)離開教室的”"},{"insert":"\n\n"},{"attributes":{"color":"#4fd3d1"},"insert":"李疏月：再也不寫了，好累"},{"insert":"\n"}]}