ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÎªÁ˼ල˾»úÊÇ·ñ×ñÊØÏÞËٹ涨£¬½»¹Ü²¿ÃÅÔÚ¹«Â·ÉÏ°²×°Á˹̶¨²âËÙÒÇ¡£ÈçͼËùʾ£¬Æû³µÏò·ÅÖÃÔÚµÀ·ÖмäµÄ²âËÙÒÇÔÈËÙÊ»À´£¬²âËÙÒÇÏòÆû³µ·¢³öÁ½´Î¶Ì´ÙµÄ³¬Éù²¨Ðźš£µÚÒ»´Î·¢³öÐźŵ½²âËÙÒǽÓÊÕµ½¾Æû³µ·´Éä»ØÀ´µÄÐźÅÓÃʱ0.5s£¬µÚ¶þ´Î·¢³öÐźŵ½²âËÙÒǽÓÊÕµ½¾Æû³µ·´Éä»ØÀ´µÄÐźÅÓÃʱ0.3s£¬Èô·¢³öÁ½´ÎÐźŵÄʱ¼ä¼ä¸ôÊÇl.ls£¬³¬Éù²¨µÄËÙ¶ÈÊÇ340m/s£¬Ôò£¨ £©
A. Æû³µ½ÓÊÕµ½µÚÒ»´ÎÐźÅʱ£¬¾à²âËÙÒÇ170m
B. Æû³µ½ÓÊÕµ½µÚ¶þ´ÎÐźÅʱ£¬¾à²âËÙÒÇ102m
C. Æû³µµÄËÙ¶ÈÊÇ34m/s
D. Æû³µµÄËÙ¶ÈÊÇ30.9m/s
¡¾´ð°¸¡¿C
¡¾½âÎö¡¿ÊÔÌâ·ÖÎö£ºµÚÒ»´ÎÐźÅÓöµ½Æû³µÊ±£¬Æû³µ¾à²âËÙÒǵľàÀëΪs1==85m£¬¹ÊA²»¶Ô£»µÚ¶þ´ÎÐźÅÓöµ½Æû³µÊ±£¬Æû³µ¾à²âËÙÒǵľàÀëΪs2==51m£¬¹ÊBÒ²²»¶Ô£»¶þ´ÎÓöµ½ÐźŵľàÀë¼ä¸ôÊÇ¡÷s=85m£51m=34m£¬Ê±¼ä¼ä¸ôÊÇ¡÷t=1.1s£0.25s +0.15s =1s£¬¹ÊÆû³µµÄËÙ¶ÈΪv==34m/s£¬¹ÊCÊÇÕýÈ·µÄ¡£
¡¾ÌâÄ¿¡¿Ä³Í¬Ñ§ÔÚ×ö̽¾¿¹âµÄÕÛÉäÌصãʵÑ飬ÈçͼÊǹâ´Ó¿ÕÆøÉäÈëË®ÖÐʱµÄ¹â·¡£ÊµÑéÖз¢ÏÖ£¬ÈëÉä¹âÏß¡¢ÕÛÉä¹âÏߺͷ¨ÏßÔÚͬһƽÃæÄÚ£¬ÕÛÉä¹âÏߺÍÈëÉä¹âÏß·Ö±ðλÓÚ·¨ÏßµÄÁ½²à¡£Í¨¹ýʵÑ黹µÃµ½ÈçÏÂÊý¾Ý£º
ÈëÉä½Ç¦Á | 0¡ã | 15¡ã | 30¡ã | 45¡ã | 60¡ã |
·´Éä½Ç¦Â | 0¡ã | 15¡ã | 30¡ã | 45¡ã | 60¡ã |
ÕÛÉä½Ç¦Ã | 0¡ã | 11.3¡ã | 22.1¡ã | 35.4¡ã | 40.9¡ã |
£¨1£©·ÖÎö±íÖеÄÊý¾Ý£¬¿ÉµÃ³öµÄ½áÂÛÊÇ£º
¢Ù¹â´Ó¿ÕÆøбÉ䵽ˮÃæʱ£¬½«Í¬Ê±·¢Éú_____ºÍ______ÏÖÏó£»
¢Ú¹â´Ó¿ÕÆøбÉ䵽ˮÃæʱ£¬ÕÛÉä½ÇËæÈëÉä½ÇµÄ±ä»¯¹ØϵÊÇ£º________________________£¬ÇÒÕÛÉä½Ç___£¨Ñ¡Ìî¡°´óÓÚ¡±¡¢¡°µÈÓÚ¡±»ò¡°Ð¡ÓÚ¡±£©ÈëÉä½Ç£»µ±¹â´Ó¿ÕÆø´¹Ö±É䵽ˮÃæ ʱ£¬ÕÛÉä½ÇµÈÓÚ_______¡£¸Ãͬѧ¸ù¾ÝÉÏÊöʵÑéÖеķ¢ÏֺͽáÂÛ¢Ú×ܽá³öÁ˹âµÄÕÛÉäÌص㡣
£¨2£©ÇëÄã¶Ô¸Ãͬѧͨ¹ýÉÏÊö̽¾¿ÊµÑéµÃ³ö¹âµÄÕÛÉäÌصãµÄ¹ý³Ì×÷³öÆÀ¼Û¡£ÊÇ·ñ´æÔÚ²»×㣿´ð£º____£»Çë¼òҪ˵Ã÷ÀíÓÉ£º_____¡£