ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÈçͼËùʾ£¬Ë®Æ½´«ËÍ´øÓÒ¶ËÓë°ë¾¶ÎªR=0.5mµÄÊúÖ±¹â»¬Ô²»¡¹ìµÀµÄÄÚ²àÏàÇÐÓÚQµã£¬´«ËÍ´øÒÔijһËÙ¶È˳ʱÕëÔÈËÙת¶¯¡£½«ÖÊÁ¿Îªm=0.2kgµÄСÎï¿éÇáÇá·ÅÔÚ´«ËÍ´øµÄ×ó¶ËPµã£¬Ð¡Îï¿éËæ´«ËÍ´øÏòÓÒÔ˶¯£¬¾QµãºóÇ¡ºÃÄܳåÉϹ⻬Բ»¡¹ìµÀµÄ×î¸ßµãN¡£Ð¡Îï¿éÓë´«ËÍ´øÖ®¼äµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì=0.5£¬È¡g=10m/s2¡£
(1)Çó´«ËÍ´øµÄ×îСת¶¯ËÙÂÊv0
(2)Çó´«ËÍ´øPQÖ®¼äµÄ×îС³¤¶ÈL
(3)Èô´«ËÍ´øPQÖ®¼äµÄ³¤¶ÈΪ4m£¬´«ËÍ´øÒÔ(1)ÖеÄ×îСËÙÂÊv0ת¶¯£¬ÇóÕû¸ö¹ý³ÌÖвúÉúµÄÈÈÁ¿Q¼°´Ë¹ý³ÌÖе綯»ú¶Ô´«ËÍ´ø×öµÄ¹¦W
¡¾´ð°¸¡¿£¨1£©5m/s £¨2£©2.5m £¨3£©2.5J 5J
¡¾½âÎö¡¿
(1)ÓÉÌâÒâÖª£¬´«ËÍ´øת¶¯ËÙÂÊ×îСʱ£¬Ð¡Îï¿éµ½´ïµãÒÑÓë´«ËÍ´øͬËÙÇÒСÎï¿é¸ÕºÃÄܵ½´ï
µã£¬ÔÚ
µãÓÐ
СÎï¿é´Óµãµ½
µã£¬Óɶ¯Äܶ¨ÀíµÃ
ÁªÁ¢½âµÃ
(2)´«ËÍ´ø³¤¶È×î¶Ìʱ£¬Ð¡Îï¿é´Óµãµ½
µãÒ»Ö±×öÔȼÓËÙÔ˶¯£¬µ½
µãʱ¸ÕºÃÓë´«ËÍ´øͬËÙ£¬ÔòÓÐ
ÁªÁ¢½âµÃ
(3)ÉèСÎï¿é¾¹ýʱ¼ä¼ÓËÙµ½Óë´«ËÍ´øͬËÙ£¬Ôò
СÎï¿éµÄλÒÆ
´«ËÍ´øµÄλÒÆ
¸ù¾ÝÌâÒâÔòÓÐ
ÁªÁ¢½âµÃ
ÓÉÄÜÁ¿Êغ㶨ÂÉ¿ÉÖª£¬µç¶¯»ú¶Ô´«ËÍ´ø×ö¹¦
´úÈëÊý¾Ý½âµÃ
![](http://thumb2018.1010pic.com/images/loading.gif)