Ñ¡ÐÞ3-4
£¨1£©ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
ACD
ACD
£º
A£®²£Á§ÖеÄÆøÅÝ¿´ÆðÀ´ÌرðÃ÷ÁÁ£¬ÊÇÒòΪ¹â´Ó²£Á§ÉäÏòÆøÅÝʱ£¬Ò»²¿·Ö¹âÔÚ½çÃæÉÏ·¢ÉúÁËÈ«·´ÉäµÄÔµ¹Ê
B£®¹âµÄÆ«ÕñÏÖÏó˵Ã÷¹âÊÇÒ»ÖÖ×ݲ¨
C£®È«Ï¢ÕÕÏàµÄÅÄÉãÀûÓÃÁ˹âµÄ¸ÉÉæÔ­Àí
D£®Ò½Ñ§ÉÏÓü¤¹â×ö¡°¹âµ¶¡±À´½øÐÐÊÖÊõ£¬Ö÷ÒªÊÇÀûÓÃÁ˼¤¹âµÄÁÁ¶È¸ßµÄÌصã
£¨2£©ÈçͼËùʾ£®Ò»Áмòгºá²¨ÑØxÖáÕý·½Ïò´«²¥£¬²¨ËÙ´óСΪ0.6m/s£®ÖʵãPµÄºá×ø±êΪs=0.96m£®´Óͼʾʱ¿Ì¿ªÊ¼¼Æʱ£¬Çó£º
¢ÙÖʵãP¿ªÊ¼Õñ¶¯Ê±Õñ¶¯µÄ·½Ïò£®
¢Ú¾­¹ý¶à³¤Ê±¼äÖʵãPµÚ¶þ´Îµ½´ï²¨·å£¿
·ÖÎö£º£¨1£©²£Á§ÖеÄÆøÅÝ¿´ÆðÀ´ÌرðÃ÷ÁÁ£¬ÊÇÒòΪ¹â´Ó²£Á§ÉäÏòÆøÅÝʱ£¬Ò»²¿·Ö¹âÔÚ½çÃæÉÏ·¢ÉúÁËÈ«·´ÉäµÄÔµ¹Ê£®¹âµÄÆ«ÕñÏÖÏó˵Ã÷¹âÊÇÒ»ÖֺᲨ£®È«Ï¢ÕÕÏàµÄÅÄÉãÀûÓÃÁ˹âµÄ¸ÉÉæÔ­Àí£®Ò½Ñ§ÉÏÓü¤¹â×ö¡°¹âµ¶¡±À´½øÐÐÊÖÊõ£¬Ö÷ÒªÊÇÀûÓÃÁ˼¤¹âµÄÁÁ¶È¸ßµÄÌص㣮
£¨2£©¢Ù¸ù¾Ý¼òгºá²¨ÑØxÖáÕý·½Ïò´«²¥£¬Åжϲ¨×îÇ°¶ËµÄÕñ¶¯·½Ïò£¬½éÖÊÖи÷¿ªÊ¼Õñ¶¯·½ÏòÓëËüÏàͬ£®¢ÚµÚ¶þ¸ö²¨·å´«µ½PµãʱÖʵãPµÚ¶þ´Îµ½´ï²¨·å£¬¸ù¾Ý¾àÀëÓëËÙ¶ÈÖ®±ÈÇó½âʱ¼ä£®
½â´ð£º½â£º£¨1£©A¡¢²£Á§ÖеÄÆøÅÝ¿´ÆðÀ´ÌرðÃ÷ÁÁ£¬ÊÇÒòΪ¹â´Ó²£Á§ÉäÏòÆøÅÝʱ£¬¼´´Ó¹âÃܽéÖÊÉäÏò¹âÊè½éÖÊʱ£¬Ò»²¿·Ö¹âÔÚ½çÃæÉÏ·¢ÉúÁËÈ«·´É䣮¹ÊAÕýÈ·£®
B¡¢¹âµÄÆ«ÕñÏÖÏó˵Ã÷¹âÊÇÒ»ÖֺᲨ¶ø²»ÊÇ×ݲ¨£®¹ÊB´íÎó£®
C¡¢È«Ï¢ÕÕÏàµÄÅÄÉãÀûÓÃÁ˹âµÄ¸ÉÉæÔ­Àí£®¹ÊCÕýÈ·£®
D¡¢Ò½Ñ§ÉÏÓü¤¹â×ö¡°¹âµ¶¡±À´½øÐÐÊÖÊõ£¬Ö÷ÒªÊÇÀûÓÃÁ˼¤¹âµÄÁÁ¶È¸ß£¬ÄÜÁ¿Ç¿µÄÌص㣮¹ÊDÕýÈ·£®
¹ÊÑ¡ACD£®
£¨2£©¢Ù²¨ÉÏÿһÖʵ㿪ʼÕñ¶¯µÄ·½Ïò¶¼Óë´Ë¿Ì²¨ÉÏ×îÇ°¶ËÖʵãµÄÕñ¶¯·½ÏòÏàͬ£¬¼´ÖʵãPÑØyÖḺ·½ÏòÕñ¶¯£®                     
¢ÚÖʵãPµÚ¶þ´Îµ½´ï²¨·åÒ²¾ÍÊǵڶþ¸ö²¨·å´«µ½Pµã£¬µÚ¶þ¸ö²¨·åµ½PµãµÄ¾àÀëΪ
    S=x+
3
4
¦Ë

ÓÖt=
S
v
                           
´úÈëÊý¾ÝµÃt=1.9s                
¹Ê´ð°¸Îª£º
£¨1£©ACD£»
£¨2£©¢ÙÖʵãP¿ªÊ¼Õñ¶¯Ê±Õñ¶¯µÄ·½ÏòPÑØyÖḺ·½Ïò£®                 
¢Ú¾­¹ý1.9sʱ¼äÖʵãPµÚ¶þ´Îµ½´ï²¨·å£®
µãÆÀ£º±¾ÌâÊÇÕñ¶¯ºÍ²¨²¿·Ö£¬£¨1£©ÒÔÑ¡ÔñÌâÐÎʽ¿¼²éÁËÈ«·´É䡢ƫÕñ¡¢¸ÉÉæµÈÏÖÏ󣮣¨2£©ÔËÓò¨ÐεÄƽÒÆ·¨½øÐв¨µÄ¼ÆË㣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

[ÎïÀí--Ñ¡ÐÞ3-4]
£¨1£©ÏÂÁйØÓÚÕñ¶¯ºÍ²¨µÄ˵·¨ÕýÈ·µÄÊÇ
BCE
BCE
£®
A£®ÔÚ¿Õ¼äij´¦Ö»ÒªÓÐÕñ¶¯·¢Éú£¬ÖÜΧ¿Õ¼äÒ»¶¨»áÐγɻúе²¨
B£®ÉùÔ´Õñ¶¯ÆµÂÊÔ½¸ß£¬ÔÚͬÖÖ½éÖÊÖÐÐγɵÄÉù²¨µÄ²¨³¤¾ÍÔ½¶Ì
C£®»úе²¨¡¢µç´Å²¨ºÍ¹â²¨¶¼ÊÊÓù«Ê½v=¦Ëf £¨v²¨ËÙ£¬¦Ë²¨³¤£¬fƵÂÊ£©
D£®Éù²¨ºÍ¹â²¨µÄ²¨ËÙÖ»Óë½éÖÊÓйأ¬¶ø¸úƵÂÊ¡¢Ç¿¶È¾ùÎÞ¹Ø
E£®»úе²¨¡¢µç´Å²¨ºÍ¹â²¨¶¼»á²úÉú¸ÉÉæ¡¢ÑÜÉäºÍÕÛÉäÏÖÏó
£¨2£©Èçͼ£¬Ò»¸öÈýÀâ¾µµÄ½ØÃæΪµÈÑüÖ±½Ç¡÷ABC£¬¡ÏAΪֱ½Ç£®Ò»Ï¸Êø¹âÏßÑش˽ØÃæËùÔÚƽÃæÇÒƽÐÐÓÚBC±ßµÄ·½ÏòÉäµ½AB±ßÉϵÄMµã£¬M¡¢A¼ä¾àΪl£®¹â½øÈëÀâ¾µºóÖ±½ÓÉäµ½AC±ßÉÏ£¬²¢¸ÕºÃÄÜ·¢ÉúÈ«·´É䣮ÊÔÇó£º
£¨¢ñ£©¸ÃÀâ¾µ²ÄÁϵÄÕÛÉäÂÊn=£¿
£¨¢ò£©¹â´ÓAB±ßµ½AC±ßµÄ´«²¥Ê±¼ät=£¿£¨ÒÑÖªÕæ¿ÕÖеĹâËÙΪc£®£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

[ÎïÀí--Ñ¡ÐÞ3-4]
£¨1£©ÏÂÁÐÓйعâÏÖÏóµÄ˵·¨ÕýÈ·µÄÊÇ
BCE
BCE
£®£¨ÌîÈëÕýÈ·Ñ¡ÏîÇ°µÄ×Öĸ£©
A£®¹âѧ¾µÍ·ÉϵÄÔö͸ĤÊÇÀûÓùâµÄÈ«·´ÉäÏÖÏó
B£®²´ËÉÁÁ°ßÊǹâµÄÑÜÉäÏÖÏó
C£®Ë«·ì¸ÉÉæʵÑéÖУ¬Èô½ö½«ÈëÉä¹âÓÉ×Ϲâ¸ÄΪºì¹â£¬ÔòÌõÎƼä¾àÒ»¶¨±ä´ó
D£®ÅÄÉã²£Á§³÷´°ÄÚµÄÎïƷʱ£¬ÍùÍùÔÚ¾µÍ·Ç°¼Ó×°Ò»¸öÆ«ÕñƬÒÔÔö¼Ó͸Éä¹âµÄÇ¿¶È
E£®ÀûÓü¤¹âƽÐжȺõÄÌصã¿ÉÒÔ²âÁ¿ÔÂÇòµ½µØÇòµÄ¾àÀë
£¨2£©ÈçͼËùʾ£¬Ò»Áмòг²¨ÑØxÖá´«²¥£¬ÊµÏßΪt1=0ʱµÄ²¨ÐÎͼ£¬´Ëʱx=m´¦µÄPÖʵãÏòyÖḺ·½ÏòÔ˶¯£¬ÐéÏßΪt2=0.01sʱµÄ²¨ÐÎͼ£¬ÒÑÖªÖÜÆÚT£¾0.01s£®Çó£º
¢ÙÕâÁв¨´«²¥µÄËٶȣ»
¢ÚÖʵãP´Ót2=0.01sµ½t3=0.07sÄÚͨ¹ýµÄ·³Ì¼°ÖʵãPÔÚt3=0.07sʱ¿ÌÏà¶ÔÓÚƽºâλÖõÄλÒÆ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

[ÎïÀí--Ñ¡ÐÞ3-4]
£¨1£©ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ
BD
BD

A£®½»Í¨¾¯Í¨¹ý·¢É䳬Éù²¨²âÁ¿³µËÙ£¬ÀûÓÃÁ˲¨µÄ¸ÉÉæÔ­Àí
B£®µç´Å²¨µÄƵÂÊÔ½¸ß£¬ËüËùÄÜЯ´øµÄÐÅÏ¢Á¿¾ÍÔ½´ó£¬ËùÒÔ¼¤¹â¿ÉÒÔ±ÈÎÞÏߵ粨´«µÝ¸ü¶àµÄÐÅÏ¢
C£®µ¥·ìÑÜÉäÖУ¬·ìÔ½¿í£¬ÌõÎÆÔ½ÁÁ£¬ÑÜÉäÏÖÏóÒ²Ô½Ã÷ÏÔ
D£®µØÃæÉϲâµÃ¾²Ö¹µÄÖ±¸Ë³¤ÎªL£¬ÔòÔÚÑظ˷½Ïò¸ßËÙ·ÉÐлð¼ýÖеÄÈ˲âµÃ¸Ë³¤Ó¦Ð¡ÓÚL
£¨2£©Ò»Áмòгºá²¨ÔÚt=0ʱ¿ÌµÄ²¨ÐÎÈçͼ1Ëùʾ£¬ÖʵãP´Ëʱ¿ÌÑØ-yÔ˶¯£¬¾­¹ý0.1sµÚÒ»´Îµ½´ïƽºâλÖ㬲¨ËÙΪ5m/s£¬ÄÇô£º
¢Ù¸Ã²¨ÑØ
-x
-x
£¨Ñ¡Ìî¡°+x¡±»ò¡°-x¡±£©·½Ïò´«²¥£»
¢ÚͼÖÐQµã£¨×ø±êΪx=7.5mµÄµã£©µÄÕñ¶¯·½³Ìy=
5cos
5
3
¦Ðt
5cos
5
3
¦Ðt
cm£»
¢ÛPµãµÄºá×ø±êΪx=
2.5
2.5
m£®
£¨3£©Èçͼ2Ëùʾ£¬A¡¢B¡¢CΪµÈÑüÀâ¾µ£¬DΪABµÄÖе㣬a¡¢bÁ½Êø²»Í¬ÆµÂʶîµÄµ¥É«¹â´¹Ö±AB±ßÉäÈëÀâ¾µ£¬Á½Êø¹âÔÚABÃæÉϵÄÈëÉäµãÊÇDµÄ¾àÀëÏàµÈ£¬Á½Êø¹âͨ¹ýÀâ¾µÕÛÉäºóÏཻÓÚͼÖÐPµã£®Ôòa¹âͨ¹ýÀâ¾µµÄʱ¼ä
´óÓÚ
´óÓÚ
b¹âͨ¹ýÀâ¾µµÄʱ¼ä£¨Ñ¡Ìî¡°´óÓÚ¡±¡¢¡°µÈÓÚ¡±»ò¡°Ð¡ÓÚ¡±£©£®a¡¢bÁ½Êø¹â´Óͬһ½éÖÊÉäÈëÕæ¿Õ¹ý³ÌÖУ¬a¹â·¢ÉúÈ«·´ÉäÁÙ½ç½Ç
СÓÚ
СÓÚ
b¹â·¢ÉúÈ«·´ÉäÁÙ½ç½Ç£¨Ñ¡Ìî¡°´óÓÚ¡±¡¢¡°µÈÓÚ¡±»ò¡°Ð¡ÓÚ¡±£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

¾«Ó¢¼Ò½ÌÍøÎïÀí--Ñ¡ÐÞ3-4
£¨1£©ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ
 

A£®¹âµÄÆ«ÕñÏÖÏó˵Ã÷¹âÊÇ×ݲ¨
B£®²ËÌÀÉϵÄÓÍ»¨³ÊÏÖ²ÊÉ«ÊǹâµÄ¸ÉÉæÏÖÏó
C£®¹âµ¼ÏËά´«²¥¹âÐźÅÀûÓÃÁ˹âµÄÈ«·´ÉäÔ­Àí
D£®¹âµÄË«·ì¸ÉÉæʵÑéÖУ¬Èô½ö½«ÈëÉä¹â´Óºì¹â¸ÄΪ×Ϲ⣬ÔòÏàÁÚÁÁÌõÎƼä¾àÒ»¶¨±ä´ó
£¨2£©ÈçͼËùʾÊÇÒ»ÁÐÑØxÖáÕý·½Ïò´«²¥µÄ¼òгºá²¨ÔÚt=0ʱ¿ÌµÄ²¨ÐÎͼ£¬²¨µÄ´«²¥ËÙ¶Èv=2m/s£¬ÊÔÇó£º
¢Ùx=4m´¦ÖʵãµÄÕñ¶¯º¯Êý±í´ïʽ
¢Úx=5m´¦ÖʵãÔÚ0¡«4.5sÄÚͨ¹ýµÄ·³Ìs£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

[ÎïÀí--Ñ¡ÐÞ3-4]
£¨1£©ÏÂÁÐËùʾµÄͼƬ¡¢Ê¾Òâͼ»òʵÑé×°ÖÃͼ¶¼À´Ô´Óڿα¾£¬ÔòÏÂÁÐÅжÏ׼ȷÎÞÎóµÄÊÇ
 

A£®¼×ͼÊÇС¿×ÑÜÉäµÄͼÑù£¬Ò²±»³ÆΪ¡°²´ËÉÁÁ°ß¡±
B£®ÒÒͼÊDZ¡Ä¤¸ÉÉæµÄÓ¦Óã¬ÓÃÀ´¼ì²âƽÃæµÄƽÕû³Ì¶È
C£®±ûͼÊÇË«·ì¸ÉÉæÔ­Àíͼ£¬ÈôPµ½S1¡¢S2µÄ·³Ì²îÊǹâµÄ°ë²¨³¤µÄżÊý±¶£¬ÔòPÊÇÁÁÎÆ
D£®¶¡Í¼ÊDZ¡Ä¤¸ÉÉæÏÖÏóµÄʵÑé×°ÖÃͼ£¬ÔÚ¸½ÓзÊÔíĤµÄÌú˿ȦÉÏ£¬³öÏÖÊúÖ±¸ÉÉæÌõÎÆ
£¨2£©ÈçÎìͼΪһ°ëÇòÐβ£Á§×©µÄÒ»¸ö½ØÃ棬Æä°ë¾¶ÎªR£®²£Á§×©µÄÕÛÉäÂÊΪn=
3
£¬¹âÏߢñ´Ó¶¥µãAÖ±ÉäÏòÇòÐÄ£¬¹âÏߢòµÄÈëÉäµãΪB£¬¡ÏAOB=60¡ã£¬ÊÔ»­³öÁ½Êø¹âÏߵĹâ·ͼ£¨Ö»»­ÕÛÉä¹âÏߣ©£¬²¢ÇóÕâÁ½Êø¹âÏß¾­CDÃæ³öÉäºóµÄ½»µãµ½ÇòÐÄOµÄ¾àÀ룮
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸