ÔÚÃñº½ºÍ»ð³µÕ¾¿ÉÒÔ¿´µ½ÓÃÓÚ¶ÔÐÐÀî½øÐа²È«¼ì²éµÄˮƽ´«ËÍ´ø.µ±ÂÿͰÑÐÐÀî·Åµ½´«ËÍ´øÉÏʱ£¬´«ËÍ´ø¶ÔÐÐÀîµÄ»¬¶¯Ä¦²ÁÁ¦Ê¹ÐÐÀʼÔ˶¯,ËæºóËüÃDZ£³ÖÏà¶Ô¾²Ö¹£¬ÐÐÀîËæ´«ËÍ´øÒ»ÆðÇ°½ø.Éè´«ËÍ´øÔÈËÙÇ°½øµÄËÙ¶ÈΪ0.25 m/s£¬ÖÊÁ¿Îª5 kgµÄľÏäÔÚ´«ËÍ´øÉÏÏà¶Ô»¬¶¯Ê±£¬ËùÊÜĦ²ÁÁ¦Îª30 N£¬ÄÇôÕâ¸öľÏä·ÅÔÚ´«ËÍ´øÉϺ󣬴«ËÍ´øÉϽ«Áô϶೤µÄĦ²ÁºÛ¼££¿

½âÎö:ľÏäµÄ¼ÓËÙ¶ÈΪa== m/s2=6 m/s2.µ±Ä¾ÏäËٶȴﵽ0.25 m/sʱ£¬Óë´«ËÍ´øÏà¶Ô¾²Ö¹£¬´Ó·ÅÉÏÖÁÏà¶Ô¾²Ö¹ËùÓÃʱ¼ät==0.042 s,´Ë¶Îʱ¼äľÏä¶ÔµØλÒÆs1=v2/2a=5¡Á10-3m.

´«ËÍ´ø¶ÔµØλÒÆs2=vt=0.25¡Á0.042 m=0.01 m,¹ÊĦ²ÁºÛ¼£³¤l=s1-s2=-5¡Á10-3 m,¼´Ïà¶Ô´«ËÍ´ø»¬¶¯5¡Á10-3 m,ºÛ¼£Îª5¡Á10-3 m.

´ð°¸:5¡Á10-3 m

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2006?ËÞǨÈýÄ££©ÔÚÃñº½ºÍ»ð³µÕ¾¿ÉÒÔ¿´µ½ÓÃÓÚ¶ÔÐÐÀî½øÐа²È«¼ì²éµÄˮƽ´«ËÍ´ø£¬µ±ÂÿͰÑÐÐÀî·Åµ½´«ËÍ´øÒ»ÆðÇ°½ø£¬Ê¹´«ËÍ´øÔÈËÙÇ°½øµÄËÙ¶ÈΪ0.25m/s£¬ÖÊÁ¿Îª5kgµÄľÏäÔÚ´«ËÍ´øÉÏÏà¶Ô»¬¶¯Ê±ËùÊܵÄĦ²ÁÁ¦Îª30N£¬ÄÇô£¬Õâ¸öľÏä·ÅÔÚ´«ËÍ´øÉϺ󣬴«ËÍ´øÉϽ«ÁôϵÄĦ²ÁºÛ¼£³¤Ô¼Îª£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚÃñº½ºÍ»ð³µÕ¾¿ÉÒÔ¿´µ½ÓÃÓÚ¶ÔÐÐÀî½øÐа²È«¼ì²éµÄˮƽ´«ËÍ´ø£¬µ±ÂÿͰÑÐÐÀî·Åµ½´«ËÍ´øÉÏʱ£¬´«ËÍ´ø¶ÔÐÐÀîµÄĦ²ÁÁ¦Ê¹ÐÐÀʼÔ˶¯£¬×îºóÐÐÀîËæ´«ËÍ´øÒ»ÆðÇ°½ø£¬Éè´«ËÍ´øÔÈËÙÇ°½øµÄËÙ¶ÈΪ 0.6m/s£¬ÖÊÁ¿Îª4.0kgµÄƤÏäÔÚ´«ËÍ´øÉÏÏà¶Ô»¬¶¯Ê±£¬ËùÊÜĦ²ÁÁ¦Îª24N£¬ÄÇô£¬Õâ¸öľÏäÎÞ³õËٵطÅÔÚ´«ËÍ´øÉϺ󣬾­¹ý
0.1
0.1
s²ÅÓëƤ´ø±£³ÖÏà¶Ô¾²Ö¹£¬´«ËÍ´øÉÏÁôÏÂÒ»Ìõ
3
3
cm³¤µÄĦ²ÁºÛ¼££®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚÃñº½ºÍ»ð³µÕ¾¿ÉÒÔ¿´µ½ÓÃÓÚ¶ÔÐÐÀî½øÐа²È«¼ì²éµÄˮƽ´«ËÍ´ø£¬µ±ÂÿͰÑÐÐÀî·Åµ½´«ËÍ´øÉÏʱ£¬´«ËÍ´ø¶ÔÐÐÀîµÄĦ²ÁÁ¦Ê¹ÐÐÀʼÔ˶¯£¬×îºóÐÐÀîËæ´«ËÍ´øÒ»ÆðÇ°½ø£¬Éè´«ËÍ´øÔÈËÙÇ°½øµÄËÙ¶ÈΪ 0.6m/s£¬ÖÊÁ¿Îª4.0kgµÄƤÏäÔÚ´«ËÍ´øÉÏÏà¶Ô»¬¶¯Ê±£¬ËùÊÜĦ²ÁÁ¦Îª24N£¬ÄÇô£¬Õâ¸öƤÏäÎÞ³õËٵطÅÔÚ´«ËÍ´øÉϺó£¬Çó£º
£¨1£©¾­¹ý¶à³¤Ê±¼ä²ÅÓëƤ´ø±£³ÖÏà¶Ô¾²Ö¹£¿
£¨2£©´«ËÍ´øÉÏÁôÏÂÒ»Ìõ¶à³¤µÄĦ²ÁºÛ¼££¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÔÚÃñº½ºÍ»ð³µÕ¾¿ÉÒÔ¿´µ½ÓÃÓÚ¶ÔÐÐÀî½øÐа²È«¼ì²éµÄˮƽ´«ËÍ´ø£®µ±ÂÿͰÑÐÐÀî·Åµ½´«ËÍ´øÉÏʱ£¬´«ËÍ´ø¶ÔÐÐÀîµÄ»¬¶¯Ä¦²ÁÁ¦Ê¹ÐÐÀʼ×öÔȼÓËÙÔ˶¯£®ËæºóËüÃDZ£³ÖÏà¶Ô¾²Ö¹£¬ÐÐÀîËæ´«ËÍ´øÒ»ÆðÇ°½ø£® Éè´«ËÍ´øÔÈËÙÇ°½øµÄËÙ¶ÈΪ0.25m/s£¬°ÑÖÊÁ¿Îª5kgµÄľÏä¾²Ö¹·Åµ½´«ËÍ´øÉÏ£¬ÓÉÓÚ»¬¶¯Ä¦²ÁÁ¦µÄ×÷Óã¬Ä¾ÏäÒÔ6m/s2µÄ¼ÓËÙ¶ÈÇ°½ø£¬ÄÇôÕâ¸öľÏä·ÅÔÚ´«ËÍ´øÉϺ󣬴«ËÍ´øÉϽ«ÁôϵÄĦ²ÁºÛ¼£Ô¼Îª£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸