Èçͼ12-6-7Ëùʾ£¬ÔÚÒ»ÌõÖ±ÏßÉÏÁ½¸öÕñÔ´A¡¢BÏà¾à6 m£¬Õñ¶¯ÆµÂÊÏàµÈ£¬´Ót0ʱ¿ÌA¡¢B¿ªÊ¼Õñ¶¯£¬ÇÒ¶¼Ö»Õñ¶¯Ò»¸öÖÜÆÚ£¬Õñ·ùÏàµÈ£¬Õñ¶¯Í¼ÏóAΪ¼×£¬BΪÒÒ¡£ÈôAÏòÓÒ´«²¥µÄ²¨ÓëBÏò×ó´«²¥µÄ²¨ÔÚt1=0.3 sʱÏàÓö£¬Ôò(    )

ͼ12-6-7

A.Á½Áв¨ÔÚA¡¢B¼äµÄ´«²¥ËٶȾùΪ10 m/s

B.Á½Áв¨µÄ²¨³¤¶¼ÊÇ4 m

C.ÔÚÁ½Áв¨ÏàÓö¹ý³ÌÖУ¬ÖеãCΪÕñ¶¯¼ÓÇ¿µã

D.t2=0.7 sʱ¿ÌBµã¾­¹ýƽºâλÖÃÇÒÕñ¶¯·½ÏòÏòÏÂ

A


½âÎö:

ÓÉÌâÒâ¿ÉÖª£¬²¨ÔÚt=0.3 sÄÚ´«²¥µÄ·³Ìs=3 m£¬¿ÉÒÔÓÉv=s/t¼ÆËã³ö²¨ËÙv=10 m/s£¬¹ÊÑ¡ÏîAÕýÈ·¡£ÓÉͼÏó¿ÉÖªT=0.2 s£¬¸ù¾Ý¹«Ê½v=¦Ë/T¿ÉÒÔ¼ÆËã³ö¦Ë=vT=2 m£¬²¨ÓÉA´«µ½CÓëÓÉB´«µ½C¶¼ÊÇ3 m£¬¼´´«²¥ÁË1.5¦Ë£¬ÓÖÒòΪA¡¢BÁ½¸öÕñÔ´ÊÇ·´ÏàµÄ£¬¹ÊCΪÕñ¶¯¼õÈõµã£¬CÏî´íÎó¡£ÔÚt2=0.7 sʱ¿ÌBµã¾­¹ýƽºâλÖ㬼´¹ýÁË3.5T£¬BµãµÄÕñ¶¯·½ÏòÊÇÏòÉϵģ¬¹ÊÑ¡ÏîDÊÇ´íÎóµÄ¡£

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-6-7Ëùʾ£¬ÔÚxÖáÉÏA¡¢BΪÕñ¶¯Çé¿öÏàͬµÄ²¨Ô´£¬Í¬Ê±Ïòͬһ·½ÏòÕñ¶¯£¬Ïà¾à3 m£¬Õñ·ùΪ0.05 m£¬Á½Áв¨²¨³¤¶¼Îª2 m£¬ÎÊ£º

ͼ12-6-7

£¨1£©xÖáÉÏ×ø±êΪ1.0 m¡¢1.5 m¡¢2.0 m¡¢2.5 m´¦ÖʵãµÄÕñ·ù¸÷ÊǶà´ó£¿

£¨2£©Èô²¨ËÙΪ5 m/s£¬Ôò2.5 m´¦µÄÖʵãFÔÚ0.8 sÄÚͨ¹ýµÄ·³ÌΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-6-7Ëùʾ£¬ÔÚÒ»ÌõÖ±ÏßÉÏÁ½¸öÕñÔ´A¡¢BÏà¾à6 m£¬Õñ¶¯ÆµÂÊÏàµÈ£¬´Ót0ʱ¿ÌA¡¢B¿ªÊ¼Õñ¶¯£¬ÇÒ¶¼Ö»Õñ¶¯Ò»¸öÖÜÆÚ£¬Õñ·ùÏàµÈ£¬Õñ¶¯Í¼ÏóAΪ¼×£¬BΪÒÒ¡£ÈôAÏòÓÒ´«²¥µÄ²¨ÓëBÏò×ó´«²¥µÄ²¨ÔÚt1=0.3 sʱÏàÓö£¬Ôò(    )

ͼ12-6-7

A.Á½Áв¨ÔÚA¡¢B¼äµÄ´«²¥ËٶȾùΪ10 m/s

B.Á½Áв¨µÄ²¨³¤¶¼ÊÇ4 m

C.ÔÚÁ½Áв¨ÏàÓö¹ý³ÌÖУ¬ÖеãCΪÕñ¶¯¼ÓÇ¿µã

D.t2=0.7 sʱ¿ÌBµã¾­¹ýƽºâλÖÃÇÒÕñ¶¯·½ÏòÏòÏÂ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Á½Áмòгºá²¨¾ùÑØxÖá·½Ïò´«²¥£¬´«²¥ËٶȴóСÏàµÈ£¬´«²¥·½ÏòÈçͼ12-6-9Ëùʾ£¬Á½Áв¨ÆµÂÊÏàͬ£¬ÔòͼÖÐx=1¡¢2¡¢3¡¢4¡¢5¡¢6¡¢7¡¢8°Ë¸öµãÖÐÕñ·ù×î´óµÄÊÇx´ó=________µÄÖʵ㣬Õñ·ù×îСµÄÊÇxС=________µÄÖʵ㡣

ͼ12-6-9

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

Èçͼ12-6-7Ëùʾ£¬ÔÚxÖáÉÏA¡¢BΪÕñ¶¯Çé¿öÏàͬµÄ²¨Ô´£¬Í¬Ê±Ïòͬһ·½ÏòÕñ¶¯£¬Ïà¾à3 m£¬Õñ·ùΪ0.05 m£¬Á½Áв¨²¨³¤¶¼Îª2 m£¬ÎÊ£º

ͼ12-6-7

£¨1£©xÖáÉÏ×ø±êΪ1.0 m¡¢1.5 m¡¢2.0 m¡¢2.5 m´¦ÖʵãµÄÕñ·ù¸÷ÊǶà´ó£¿

£¨2£©Èô²¨ËÙΪ5 m/s£¬Ôò2.5 m´¦µÄÖʵãFÔÚ0.8 sÄÚͨ¹ýµÄ·³ÌΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸