初二物理知识，求助各位大佬解释一下 初二物理知识问答题30道
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二力平衡A在F弹和fA的作用下处于静止状态，这两个力相互平衡
而二力平衡的条件是：作用在同一物体上的两个力，大小相等，方向相反，且在同一直线上，这两个力才能平衡？
以小木块水平方向受到小车对它的摩擦力，方向向左，以及弹簧通过定滑轮对它的拉力，方向向右。
显然这一对力是平衡力，等大，反向，共线
绛旓細閾炬帴: https://pan.baidu.com/s/1BNO6OizzUM0Xgh4jezJzfA 鎻愬彇鐮: awu9 楂橀旇鍫傞儹蹇楀己鍒濅簩鐗╃悊2020瀵掑亣鐝紝4.80G鐧惧害缃戠洏楂樻竻瑙嗛銆
绛旓細鐗╃悊锛灏ゅ叾鍒濅腑鐗╃悊鍏跺疄涓嶉毦锛屽叧閿槸瑕佺湡姝ｇ殑鐢ㄥ績鍘荤湅锛屽摢鎬曚粠鍒濅竴鐨勫紑濮嬶紝浠庡ご寮濮嬩篃杩樻潵寰楀強鐨勶紝杈逛笂鏈変釜鑰佸笀鍙互鍘婚棶锛屾妸姣忓ぉ閬囧埌鐨勪笉鎳傜殑鎷垮幓闂紝姣忓ぉ寰鍓嶇湅3灏忔椂锛屽仛1灏忔椂鐨勯鐩備細鍋氫簡锛屾噦浜嗗啀鍚戜笅鐪嬨傛斁蹇冿紝涓嶉毦鐨勩
绛旓細鐒跺悗锛岀‘瀹氳嚜宸辩殑鐩爣銆傚缓璁厛鎶婄洰鏍囧畾鍦ㄥ璧涳紝瀛︿範杩囩▼涓繚鎸佸钩甯稿績锛屽瀛︿範绔炶禌鐭ヨ瘑銆傝繘鍏ラ珮涓箣鍓嶇殑鏆戝亣鍙互鍙傝冪殑涔︾睄锛氱涓姝ワ細蹇熺湅瀹岄珮涓鐗╃悊璇炬湰蹇呬慨涓銆佸繀淇簩浠ュ強楂樹腑鏁板寰Н鍒嗛儴鍒嗭紝鍋氬埌璇惧悗涔犻浼氬仛鐨勭▼搴﹀氨鍙互銆傜浜屾锛氱湅鐪嬨愭柊姒傚康鐗╃悊璇绘湰銆戠涓鍐岋紝鍩瑰吇鐗╃悊鍏磋叮銆佺墿鐞嗘濈淮鐢紝鍙綋灏忚...
绛旓細閾炬帴: https://pan.baidu.com/s/1YuBgWDKemccYzxzhfLlO9w 鎻愬彇鐮: 7752 瀛﹁屾2020绉嬪鍒濅簩鏉ㄨ悓鐗╃悊鐩存挱鐩爣鐝叏鍥界増锛屽畬缁撶増鐧惧害缃戠洏6.26G楂樻竻瑙嗛銆
绛旓細閾炬帴: https://pan.baidu.com/s/1I1j9CI-0O1xC_t4bPYN81g 鎻愬彇鐮: 5kh4 瀛﹁屾2020绉嬪鍒濅簩鏉滄槬闆鐗╃悊鐩存挱鐩爣鐝叏鍥界増锛屽畬缁撶増鐧惧害缃戠洏6.05G楂樻竻瑙嗛銆
绛旓細閾炬帴: https://pan.baidu.com/s/1GTzvwF478vNenCq76bn07A 鎻愬彇鐮: m8ab 瀛﹁屾2020鏄ュ鍒濅簩鐗╃悊鏉滄槬闆ㄨ弫鑻辩彮锛屽畬缁撶増鐧惧害缃戠洏4.88G楂樻竻瑙嗛銆
绛旓細閾炬帴: https://pan.baidu.com/s/1hQrsFy0SkFYnf8W_H47XcQ 鎻愬彇鐮: xcsc 2021楂橀鍒濅簩琚佸獩鐗╃悊瀵掑亣鐝紝鐧惧害缃戠洏1.44G楂樻竻瑙嗛銆
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绛旓細閾炬帴: https://pan.baidu.com/s/1TJjJquzXXKp6yXdBNZEgAw 鎻愬彇鐮: fvee 瀛﹁屾2020瀵掑亣鍒濅簩鏉滄槬闆鐗╃悊鑿佽嫳鐝洿鎾锛岀櫨搴︾綉鐩2.72G楂樻竻瑙嗛銆
绛旓細閾炬帴: https://pan.baidu.com/s/14bni0AS37Jii18sZbGORlg 鎻愬彇鐮: ia5p 瀛﹁屾2021瀵掑亣鍒濅簩鏉滄槬闆鐗╃悊鐩爣鐝
