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高三复习5:受力分析

  • 2026-09-24 09:56:19
高三复习5:受力分析
思考：
1.核心主题力与运动，不看运动状态孤立的谈受力分析毫无意义。知受力定运动，知运动定受力，两类基本问题贯穿高中始终。
2.受力分析的方法很多，关键在手勤，画关键词和受力，抓基础、普适性方法为先，如正交分解法、三力平衡中的图解法。个人认为终极难点几乎都在数学上，有时候一个角的确定就把我们弄得不舒服了。
3.熟练掌握了受力分析，你的高中物理就基本ok了！
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  1. CONNECT:[ UseTime:0.000481s ] mysql:host=172.18.0.4;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000713s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000367s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000359s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000525s ]
  6. SELECT * FROM `set` [ RunTime:0.000304s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000615s ]
  8. SELECT * FROM `article` WHERE `id` = 515773 LIMIT 1 [ RunTime:0.000346s ]
  9. UPDATE `article` SET `lasttime` = 1790216175 WHERE `id` = 515773 [ RunTime:0.001014s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000320s ]
  11. SELECT * FROM `article` WHERE `id` < 515773 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000412s ]
  12. SELECT * FROM `article` WHERE `id` > 515773 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000411s ]
  13. SELECT * FROM `article` WHERE `id` < 515773 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000741s ]
  14. SELECT * FROM `article` WHERE `id` < 515773 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000655s ]
  15. SELECT * FROM `article` WHERE `id` < 515773 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000696s ]
0.102770s