ÌâÄ¿ÄÚÈÝ

¡¾ÌâÄ¿¡¿Ë®Æ½´«ËÍ´ø±»¹ã·ºµØÓ¦ÓÃÓÚ»ú³¡ºÍ»ð³µÕ¾£¬ÓÃÓÚ¶ÔÂÿ͵ÄÐÐÀî½øÐа²È«¼ì²é¡£ÈçͼËùʾΪһˮƽ´«ËÍ´ø×°ÖÃʾÒâͼ£¬±Á½ôµÄ´«ËÍ´øABʼÖÕ±£³Öºã¶¨µÄËÙÂÊv£½1 m/sÔËÐУ¬Ò»ÖÊÁ¿Îªm£½4 kgµÄÐÐÀîÎÞ³õËٵطÅÔÚA´¦£¬´«ËÍ´ø¶ÔÐÐÀîµÄ»¬¶¯Ä¦²ÁÁ¦Ê¹ÐÐÀʼ×öÔȼÓËÙÖ±ÏßÔ˶¯£¬ËæºóÐÐÀîÓÖÒÔÓë´«ËÍ´øÏàµÈµÄËÙÂÊ×öÔÈËÙÖ±ÏßÔ˶¯¡£ÉèÐÐÀîÓë´«ËÍ´ø¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì£½0.1£¬A¡¢B¼äµÄ¾àÀëL£½2 m£¬gÈ¡10 m/s£²¡£

(1)ÇóÐÐÀî¸Õ¿ªÊ¼Ô˶¯Ê±ËùÊܵĻ¬¶¯Ä¦²ÁÁ¦´óСÓë¼ÓËٶȴóС£»

(2)ÇóÐÐÀî×öÔȼÓËÙÖ±ÏßÔ˶¯µÄʱ¼ä£»

(3)Èç¹ûÌá¸ß´«ËÍ´øµÄÔËÐÐËÙÂÊ£¬ÐÐÀî¾ÍÄܱ»½Ï¿ìµØ´«Ë͵½B´¦¡£ÇóÐÐÀî´ÓA´¦´«Ë͵½B´¦µÄ×î¶Ìʱ¼äºÍ´«ËÍ´ø¶ÔÓ¦µÄ×îСÔËÐÐËÙÂÊ¡£

¡¾´ð°¸¡¿£¨1£©ÐÐÀî¸Õ¿ªÊ¼Ô˶¯Ê±ËùÊܵĻ¬¶¯Ä¦²ÁÁ¦´óСΪ4N£¬¼ÓËٶȴóСΪ1m/s2£®

£¨2£©ÐÐÀî×öÔȼÓËÙÖ±ÏßÔ˶¯µÄʱ¼äΪ1s£®

£¨3£©ÐÐÀî´ÓA´¦´«Ë͵½B´¦µÄ×î¶Ìʱ¼äΪ2s£¬´«ËÍ´ø¶ÔÓ¦µÄ×îСÔËÐÐËÙÂÊΪ2m/s£®

¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£º£¨1£©»¬¶¯Ä¦²ÁÁ¦µÄ´óСΪF£½¦Ìmg´úÈëÊý¾ÝµÃF£½4 NÓÉÅ£¶ÙµÚ¶þ¶¨Âɵã¬F£½ma½âµÃa£½1 m/s2

£¨2£©ÉèÐÐÀî×öÔȼÓËÙÖ±ÏßÔ˶¯µÄʱ¼äΪt£¬ÐÐÀî¼ÓËÙÔ˶¯µÄÄ©ËÙ¶ÈΪv£½1 m/s¡£

ÓÉv£½atµÃt£½1 s

£¨3£©ÐÐÀî´ÓA´¦Ò»Ö±ÔȼÓËÙÖ±ÏßÔ˶¯µ½B´¦Ê±£¬´«ËÍʱ¼ä×î¶Ì¡£Ôò½âµÃtmin£½2 s

´«ËÍ´ø¶ÔÓ¦µÄ×îСÔËÐÐËÙÂÊvmin£½atmin£½2 m/s

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø