ÏÂͼÊÇÒ»ÁÐÏòxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨ÔÚt = 0ʱ¿ÌµÄ²¨ÐÎͼ£¬´ËʱÖʵãBÇ¡ºÃÔ˶¯µ½²¨·å£¬ÖʵãCÇ¡ºÃͨ¹ýƽºâλÖá£Èô¸Ã²¨µÄÖÜÆÚΪ4.0s£¬Ôò¶ÔÖʵãBºÍCÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ¡¡¡¡

A£®ËüÃÇ¿ªÊ¼Õñ¶¯Ê±µÄÔ˶¯·½Ïò²»Ïàͬ

B£®ËüÃÇÔÚ¿ªÊ¼ÕñÖ§µÄµÚÒ»³ÆÄÚ¼ÓËٶȷ½Ïò¾ùÒ»¶¨ÑØyÖáÕý·½Ïò

C£®ÔÚ¿ªÊ¼Õñ¶¯ºóµÄÈκÎÁ¬ÐøµÄ2sÄÚ£¬ºÏÍâÁ¦¶ÔËüÃÇ×öµÄ¹¦¶¼ÎªÁã

¡¡¡¡¡¡ D£®ËüÃÇÕñ¶¯¹ý³ÌÖеÄÈÎÒâ1sÄÚͨ¹ý·³Ì¾ùΪ2.0cm

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2008ÄêÉϺ£ÊÐÄÏ»ã¸ßÈýµÚ¶þ´ÎÄ£Ä⿼ÊÔ¡¢ÎïÀí ÌâÐÍ£º013

ÏÂͼΪһÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨ÔÚt£½0ʱµÄ²¨ÐΣ®µ±RµãÔÚt£½0ʱµÄÕñ¶¯×´Ì¬´«µ½Sµãʱ£¬PR·¶Î§ÄÚ(º¬P¡¢R)ÓÐһЩÖʵãÕýÔÚÏòyÖáÕý·½ÃæÔ˶¯£¬ÕâЩÖʵãµÄx×ø±êÈ¡Öµ·¶Î§ÊÇ

[¡¡¡¡]

A£®2 cm¡Üx¡Ü4 cm

B£®2 cm¡Üx£¼3 cm

C£®3 cm£¼x£¼5 cm

D£®3 cm¡Üx¡Ü5 cm

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ÏÂͼΪһÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨ÔÚt=0ʱµÄ²¨ÐÎ.µ±R´¦ÖʵãÔÚt=0ʱµÄÕñ¶¯×´Ì¬´«µ½S´¦Ê±£¬¹ØÓÚP¡¢R´¦µÄÖʵ㣬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ(    )

A.P´¦µÄÖʵãλÓÚ²¨·å

B.P´¦µÄÖʵãËٶȴﵽ×î´ó

C.R´¦µÄÖʵãλÓÚ²¨·å

D.R´¦µÄÖʵãËٶȴﵽ×î´ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2013-2014±±¾©ÊÐʯ¾°É½Çø¸ßÈýһģÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÑ¡ÔñÌâ

ÏÂͼÊÇÒ»ÁÐÑØ×ÅxÖáÕý·½Ïò´«²¥µÄºá²¨ÔÚt = 0ʱ¿ÌµÄ²¨ÐÎͼ¡£ÒÑÖªÕâÁв¨µÄÖÜÆÚT = 2.0s¡£ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ

A£®ÕâÁв¨µÄ²¨ËÙv = 2.0 m/s

B£®ÔÚt = 0ʱ£¬x = 0.5m´¦µÄÖʵãËÙ¶ÈΪÁã

C£®¾­¹ý2.0s£¬ÕâÁв¨ÑØxÖáÕý·½Ïò´«²¥0.8m

D£®ÔÚt = 0.3sʱ£¬x = 0.5m´¦µÄÖʵãµÄÔ˶¯·½ÏòΪyÖáÕý·½Ïò

 

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2013½ì±±¾©ËÄÖи߶þÉÏѧÆÚÆÚÄ©¿¼ÊÔÎïÀí¾í ÌâÐÍ£ºÑ¡ÔñÌâ

ͼ¼×ÊÇÒ»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òг²¨Ä³Ê±¿ÌµÄ²¨ÐΣ¬´Ó´Ë¿ÌÆð¼Æʱ£¬a¡¢b¡¢c¡¢dËĵãµÄÕñ¶¯Í¼Ïó¿ÉÒÔÓÃÏÂͼÒÒ±íʾµÄÊÇ_______µã£»¸ÃµãµÄÕñ¶¯·½³ÌΪ__________m¡£

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸