ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿¸ÛÖé°Ä´óÇÅÊÇÊÀ½çÉÏ×µÄ¿çº£´óÇÅ£¬ËüÓÉÇÅÁººÍº£µ×ËíµÀ×é³É¡£ËíµÀÓÉÒ»½ÚÒ»½ÚÓøֽî»ìÄýÍÁ×ö³ÉµÄ¿ÕÐijÁ¹ÜÁ¬½Ó¶ø³É£¬ÈçͼËùʾ£¬½¨ÔìËíµÀʱ£¬ÏȽ«³Á¹ÜÁ½¶ËÃܷ⣬Èçͬһ¸ö¾Þ´óµÄ³¤·½Ìå¿ÕÐÄÏä×Ó£¬È»ºóÈÃÆäƯ¸¡ÔÚº£ÃæÉÏ£¬ÔÙÓô¬½«ÃÜ·â³Á¹ÜÍϵ½Ô¤¶¨º£ÃæÉÏ£¬ÏòÆäÄÚ²¿¹àˮʹ֮³ÁÈ뺣µ×½øÐа²×°£¨²»¿¼ÂÇ´óÆøѹµÄ×÷Óã©¡£Éèijһ½ÚÃܷⳤ·½Ìå³Á¹ÜµÄ³¤¡¢¿í¡¢¸ß·Ö±ðÊÇ180m¡¢40m¡¢11m¡£
£¨1£©¸Ã½ÚÃÜ·â³Á¹ÜƯ¸¡ÔÚº£ÃæʱϱíÃæ¾àº£Ãæ10m£¬Çó¸Ã½ÚÃÜ·â³Á¹ÜϱíÃæÊܵ½º£Ë®µÄѹÁ¦£¿£¨¦Ñº£Ë®=1.0¡Á103kg/m3 g=10N/kg£©¡£
£¨2£©¸Ã½ÚÃÜ·â³Á¹ÜÉϱíÃæ¸Õ½þûÔÚº£Ë®ÖÐʱÊܵ½µÄ¸¡Á¦¶à´ó£¿
£¨3£©µ±ÃÜ·â³Á¹Ü¹àˮϳÁµ½º£µ×ºó£¬½«ÆäÏ°벿·ÖÂñÈ뺣µ×ÄàɳÖУ¬ÔÙ½«¹àÈëÆäÖеĺ£Ë®È«²¿³é³ö£¬´ËʱµÄ¿ÕÐÄÃÜ·â³Á¹Ü²»»áÔÙÉϸ¡£¬ÆäÉϱíÃæµ½º£ÃæµÄÉî¶ÈΪ40m£¬Çó´Ëʱ¸Ã½ÚÃÜ·â³Á¹Ü¶Ôº£µ×ÄàɳµÄѹǿÓжà´ó£¿
¡¾´ð°¸¡¿£¨1£©7.2¡Á108N£»£¨2£©7.92¡Á108N£»£¨3£©5¡Á105Pa
¡¾½âÎö¡¿
£¨1£©£®ÃÜ·â³Á¹ÜƯ¸¡ÔÚº£ÃæʱϱíÃæ¾àº£Ãæ10m£¬ÔòϱíÃæÊܵ½º£Ë®µÄѹǿΪ£º
£»
³Á¹ÜµÄÏ£¨ÉÏ£©±íÃæ»ýΪ£º£»
¸ù¾ÝµÃ£¬ÃÜ·â³Á¹ÜϱíÃæÊܵ½º£Ë®µÄѹÁ¦£º
£»
£¨2£©£®¸Õ½þûÔÚº£Ë®ÖÐʱÅÅ¿ªË®µÄÌå»ýΪ£»
£»
Ôò´ËʱÊܵ½µÄ¸¡Á¦Îª£º
£»
£¨3£©£®½«³Á¹ÜÏ°벿·ÖÂñÈ뺣µ×ÄàɳÖУ¬Ôò³Á¹ÜϱíÃæ²»ÄÜÊܵ½Ë®µÄѹÁ¦£¬ËùÒÔ´Ëʱ²»»áÔÙÓи¡Á¦×÷Óã¬ÃÜ·â³Á¹Ü²»»áÔÙÉϸ¡£»
ÓɵÚÒ»ÎÊÖª£¬µ±³Á¹ÜƯ¸¡¾²Ö¹Ê±£¬³Á¹ÜµÄÖØÁ¦ÓëϱíÃæÊܵ½º£Ë®µÄѹÁ¦£¨¼´´ËʱµÄ¸¡Á¦£©Æ½ºâ£¬ËùÒÔ³Á¹ÜÖØΪ£º
£»
ÉϱíÃæµ½º£ÃæµÄÉî¶ÈΪ40m£¬Ôò´ËʱÉϱíÃæÊܵ½º£Ë®ÏòϵÄѹÁ¦Îª£º
£»
¸ù¾ÝµÃ£¬´Ëʱ¸Ã½ÚÃÜ·â³Á¹Ü¶Ôº£µ×ÄàɳµÄѹǿΪ£º
¡£
´ð£º£¨1£©£®¸Ã½ÚÃÜ·â³Á¹ÜƯ¸¡ÔÚº£ÃæʱϱíÃæ¾àº£Ãæ10m£¬¸Ã½ÚÃÜ·â³Á¹ÜϱíÃæÊܵ½º£Ë®µÄѹÁ¦Îª7.2¡Á108N£»
£¨2£©£®¸Ã½ÚÃÜ·â³Á¹ÜÉϱíÃæ¸Õ½þûÔÚº£Ë®ÖÐʱÊܵ½µÄ¸¡Á¦Îª7.92¡Á108N£»
£¨3£©£®Ï°벿·ÖÂñÈ뺣µ×ÄàɳÖУ¬ÆäÉϱíÃæµ½º£ÃæµÄÉî¶ÈΪ40m£¬´Ëʱ¸Ã½ÚÃÜ·â³Á¹Ü¶Ôº£µ×ÄàɳµÄѹǿΪ5¡Á105Pa¡£
![](http://thumb2018.1010pic.com/images/loading.gif)