ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæÉÏA¡¢BÁ½Îï¿éÖÊÁ¿ÏàµÈ²¢ÓÃÎÞµ¯ÐÔÇáÉþÁ¬½Ó£¬ÇáÖʵ¯»ÉÁ½¶Ë·Ö±ðÓëǽ±ÚºÍÎï¿éAÏàÁ¬£¬F-LͼÏó±íʾ´Ëµ¯»ÉµÄµ¯Á¦´óСÓ볤¶È¹Øϵ£®µ±µ¯»ÉΪԭ³¤Ê±Îï¿éAÔÚPλÖ㬵±Îï¿éBÔÚˮƽÏòÓÒµÄÍâÁ¦F0×÷ÓÃÏ´¦ÓÚ¾²Ö¹×´Ì¬Ê±Îï¿éAÔÚQλÖ㬴Ëʱµ¯»É³¤¶ÈΪ0.7Ã×£®³·È¥F0ºó£¬A¡¢B¿ªÊ¼Ïò×óÔ˶¯£¬AÎï¿éµÚ¶þ´Î¾­¹ýPµãÇ°ÓëBÎï¿éÏàÓö£¬ÒÑÖªµ¯»ÉÕñ×Ó×ö¼òгÔ˶¯µÄÖÜÆÚÓɵ¯»ÉµÄ¾¢¶ÈϵÊýºÍÕñ×ÓÖÊÁ¿¾ö¶¨£¬ÔòÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ
¢Ùµ¯»ÉµÄ¾¢¶ÈϵÊýµÈÓÚ80N/m
¢Ú³·È¥F0ºó£¬A¡¢BÒ»ÆðÏò×óÔ˶¯µ½µ¯»É³¤¶ÈΪ0.6mʱÇáÉþµÄÀ­Á¦Îª10N
¢ÛÈôÊʵ±Ôö¼ÓA¡¢B¼äÇáÉþµÄ³¤¶È£¬¶øÆäËüÌõ¼þ²»±ä£¬Ôò¿ÉʹAÔÚµÚ¶þ´Î¾­¹ýPµãʱÓëBÏàÓö
¢ÜÈôÊʵ±Ôö´óF0µÄ´óС£¬Ê¹Îï¿éAµÄ³õʼλÖÃÔÚQµãÓÒ·½£¬Ôò³·È¥F0ºó¿ÉʹAÔÚµÚ¶þ´Î¾­¹ýPµãʱÓëBÏàÓö


  1. A.
    ¢Ù¢Û
  2. B.
    ¢Ú¢Û
  3. C.
    ¢Ù¢Ü
  4. D.
    ¢Ú¢Ü
B
·ÖÎö£º¸ù¾Ýºú¿Ë¶¨ÂÉÇó³öµ¯»ÉµÄ¾¢¶ÈϵÊý£»Í¨¹ýÕûÌå·¨Çó³öÕûÌåµÄ¼ÓËٶȣ¬ÔÙͨ¹ý¸ôÀë·¨Çó³öÉþ×ÓÀ­Á¦£®µ¯»É»Ö¸´Ô­³¤ºó£¬A×ö¼õËÙÈ»ºó·´µ¯ºó×ö¼ÓËÙ£¬µ¯»É»Ö¸´Ô­³¤ºó£¬×öÔÈËÙÖ±ÏßÔ˶¯£¬¸ù¾ÝÔ˶¯Ñ§¹æÂɽøÐзÖÎö£®
½â´ð£º¢Ù¸ù¾Ýºú¿Ë¶¨Âɵã¬ÓÉͼÏóÖª£¬µ¯»ÉµÄ¾¢¶ÈϵÊýΪ£º£®¹Ê¢Ù´íÎó£®
¢Ú³·È¥F0ºó£¬A¡¢BÒ»ÆðÏò×óÔ˶¯µ½µ¯»É³¤¶ÈΪ0.6mʱ£¬µ¯»ÉµÄµ¯Á¦F=kx=200¡Á0.1N=20N£¬ÕûÌå¼ÓËٶȣ¬ÔòÉþ×ÓÀ­Á¦T=ma=10N£®¹Ê¢ÚÕýÈ·£®
¢Ûµ¯»É»Ö¸´Ô­³¤ºó£¬×ö¼õËÙÔ˶¯£¬·´µ¯ºó×ö¼ÓËÙÔ˶¯£¬BÒÔµ¯»É»Ö¸´Ô­³¤Ê±µÄËÙ¶È×öÔÈËÙÖ±ÏßÔ˶¯£¬BµÄËٶȴóÓÚAµÄËٶȣ¬ÈôÒªµÚ¶þ´Î¾­¹ýPµãʱÏàÓö£¬ÔòÐèÔö¼ÓÇáÉþµÄ³¤¶È£¬Ê¹µÃB×öÔÈËÙÖ±ÏßÔ˶¯µÄʱ¼ä³¤Ò»Ð©£®¹Ê¢ÛÕýÈ·£®
¢ÜÈôÊʵ±Ôö´óF0µÄ´óС£¬Ê¹Îï¿éAµÄ³õʼλÖÃÔÚQµãÓÒ·½£¬Ôò³·È¥F0ºó£¬ABÕûÌå»Øµ½µ¯»ÉµÄÔ­³¤Î»ÖÃʱËٶȸü´ó£¬ÔòµÚ¶þ´ÎÏàÓöµÄλÖÃÈÔÈ»ÔÚPµãµÄ×ó²à£®¹Ê¢Ü´íÎó£®
¹ÊÑ¡B£®
µãÆÀ£º½â¾ö±¾ÌâµÄ¹Ø¼üÀíÇåA¡¢BÔÚÕû¸ö¹ý³ÌÖеÄÔ˶¯Çé¿ö£¬½áºÏÅ£¶ÙµÚ¶þ¶¨ÂÉÇó½â£¬×¢ÒâÕûÌå·¨ºÍ¸ôÀë·¨µÄÔËÓã®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæABÓëÊúÖ±ÃæÄڵİëÔ²Ðε¼¹ìÔÚBµãÏà½Ó£¬µ¼¹ì°ë¾¶ÎªR£®Ò»¸öÖÊÁ¿ÎªmµÄÎïÌ彫µ¯»ÉѹËõÖÁAµãºóÓɾ²Ö¹ÊÍ·Å£¬ÔÚµ¯Á¦×÷ÓÃÏÂÎïÌå»ñµÃijһÏòÓÒËٶȺóÍÑÀ뵯»É£¬ÍÑÀ뵯»Éºóµ±Ëü¾­¹ýBµã½øÈëµ¼¹ì˲¼ä¶Ôµ¼¹ìµÄѹÁ¦ÎªÆäÖØÁ¦µÄ7±¶£¬Ö®ºóÏòÉÏÔ˶¯Íê³É°ë¸öÔ²ÖÜÔ˶¯Ç¡ºÃµ½´ïCµã£®ÊÔÇó£º
£¨1£©µ¯»É¿ªÊ¼Ê±µÄµ¯ÐÔÊÆÄÜ£»
£¨2£©ÎïÌå´ÓBµãÔ˶¯ÖÁCµã¿Ë·þ×èÁ¦×öµÄ¹¦£»
£¨3£©ÎïÌåÀ뿪CµãºóÂä»ØˮƽÃæʱµÄËٶȴóСºÍ·½Ïò£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæÓëÒ»°ë¾¶ÎªR´¦ÔÚÊúƽÃæÄڵĹ⻬Բ¹ìµÀÏàÇУ¬ÖÊÁ¿ÎªmµÄСÇò£¨¿ÉÊÓΪÖʵ㣩ÒÔ³õËÙ¶Èv0ÏòÓÒÔ˶¯½øÈëÔ²¹ìµÀ£¬ÔÚͼÖÐÐéÏßλÖÃÍÑÀë¹ìµÀ£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬ÏÂÊö˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæMN×ó¶Ëµ²°å´¦ÓÐÒ»µ¯Éä×°ÖÃP£¬ÓÒ¶ËNÓë´¦ÓÚͬһ¸ß¶ÈµÄˮƽ´«ËÍ´øÖ®¼äµÄ¾àÀë¿ÉºöÂÔ£¬Ë®Æ½²¿·ÖNQµÄ³¤¶ÈL=8m£¬Æ¤´øÂÖÄæʱÕëת¶¯´ø¶¯´«ËÍ´øÒÔv=2m/sµÄËÙ¶ÈÔÈËÙת¶¯£®MNÉÏ·ÅÖÃÁ½¸öÖÊÁ¿¶¼Îªm=1.0kgµÄСÎï¿éA¡¢B£¬ËüÃÇÓë´«ËÍ´ø¼äµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì=0.4£®¿ªÊ¼Ê±£¬A¡¢B¾²Ö¹£¬A¡¢B¼äѹËõÒ»ÇáÖʵ¯»É£¬Æ䵯ÐÔÊÆÄÜEP=16J£®ÏÖ½â³ýËø¶¨£¬µ¯¿ªA¡¢B£¬²¢Ñ¸ËÙÒÆ×ßµ¯»É£®
£¨1£©ÇóÎï¿éB±»µ¯¿ªÊ±ËٶȵĴóС£»
£¨2£©AÓëPÏàÅöºó¾²Ö¹£¬µ±Îï¿éB·µ»ØˮƽÃæMNºó£¬A±»Pµ¯³ö£¬A¡¢BÏàÅöºóÕ³ÔÚÒ»ÆðÏòÓÒ»¬¶¯£¬ÒªÊ¹A¡¢BÁ¬½ÓÌå¸ÕºÃ´ÓQ¶Ë»¬³ö£¬ÇóP¶ÔA×öµÄ¹¦£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2013?È綫ÏØÄ£Ä⣩ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæABÓëÊúÖ±ÃæÄڴֲڵİëÔ²Ðε¼¹ìÔÚBµãÏνӣ¬BCΪµ¼¹ìµÄÖ±¾¶£¬ÓëˮƽÃæ´¹Ö±£¬µ¼¹ì°ë¾¶ÎªR£¬Ò»¸öÖÊÁ¿ÎªmµÄСÇò½«µ¯»ÉѹËõÖÁA´¦£®Ð¡Çò´ÓA´¦Óɾ²Ö¹Êͷű»µ¯¿ªºó£¬ÒÔËÙ¶Èv¾­¹ýBµã½øÈë°ëÔ²ÐιìµÀ£¬Ö®ºóÏòÉÏÔ˶¯Ç¡ÄÜÑعìµÀÔ˶¯µ½Cµã£¬Çó£º
£¨1£©ÊÍ·ÅСÇòÇ°µ¯»ÉµÄµ¯ÐÔÊÆÄÜ£»
£¨2£©Ð¡Çòµ½´ïCµãʱµÄËٶȺÍÂ䵽ˮƽÃæʱÀëBµãµÄ¾àÀ룻
£¨3£©Ð¡ÇòÔÚÓÉBµ½C¹ý³ÌÖп˷þ×èÁ¦×öµÄ¹¦£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÈçͼËùʾ£¬¹â»¬Ë®Æ½ÃæÄÚ£¬Ò»¸ùϸÉþÒ»¶Ë¹Ì¶¨£¬ÁíÒ»¶ËϵһСÇò£¬ÏÖÈÃСÇòÔÚˮƽÃæÄÚ×öÔÈËÙÔ²ÖÜÔ˶¯£¬Ôò£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸