·ÖÎö £¨1£©×öÔȱäËÙÖ±ÏßÔ˶¯µÄÎïÌ壬ijһʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚÕâ¶Îʱ¼äÖмäʱ¿ÌµÄ˲ʱËٶȣ¬ËùÒÔBµãµÄËٶȵÈÓÚACÁ½µã¼äµÄƽ¾ùËٶȣ¬DµãËٶȵÈÓÚCEÁ½µã¼äµÄƽ¾ùËÙ¶È
£¨2£©¸ù¾ÝÖð²î·¨Çó¼ÓËÙ¶È
½â´ð ½â£º£¨1£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯Öмäʱ¿ÌµÄ˲ʱËٶȵÈÓڸùý³ÌÖеÄƽ¾ùËٶȣ¬ËùÒÔ
${v}_{B}^{\;}=\frac{{x}_{AC}^{\;}}{2T}=\frac{£¨4.61+6.59£©¡Á1{0}_{\;}^{-2}}{0.2}m/s=0.56m/s$
${v}_{D}^{\;}=\frac{{x}_{CE}^{\;}}{2T}=\frac{£¨8.61+10.61£©¡Á1{0}_{\;}^{-2}}{0.2}m/s=0.96m/s$
£¨2£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄÍÆÂÛ¹«Ê½$¡÷x=a{T}_{\;}^{2}$¿ÉÒÔÇó³ö¼ÓËٶȵĴóС£¬µÃ
${x}_{3}^{\;}-{x}_{1}^{\;}=2{a}_{1}^{\;}{T}_{\;}^{2}$
${x}_{4}^{\;}-{x}_{2}^{\;}=2{a}_{2}^{\;}{T}_{\;}^{2}$
ΪÁ˸ü¼Ó׼ȷµÄÇó½â¼ÓËٶȣ¬ÎÒÃǶÔÁ½¸ö¼ÓËÙ¶Èȡƽ¾ùÖµµÃ
$a=\frac{1}{2}£¨{a}_{1}^{\;}+{a}_{2}^{\;}£©=\frac{£¨{x}_{3}^{\;}+{x}_{4}^{\;}£©-£¨{x}_{1}^{\;}+{x}_{2}^{\;}£©}{4{T}_{\;}^{2}}$=$\frac{[£¨8.61+10.61£©-£¨4.61+6.59£©]¡Á1{0}_{\;}^{-2}}{4¡Á0£®{1}_{\;}^{2}}$$m/{s}_{\;}^{2}$=2.0$m/{s}_{\;}^{2}$
¹Ê´ð°¸Îª£º£¨1£©0.56£¬0.96£»£¨2£©2.0£®
µãÆÀ ±¾Ìâ½èÖúʵÑ鿼²éÁËÔȱäËÙÖ±ÏߵĹæÂÉÒÔ¼°ÍÆÂÛµÄÓ¦Óã¬ÖªµÀÖ½´øµÄÊý¾Ý´¦Àí·½·¨£¬8ÔÚƽʱÁ·Ï°ÖÐÒª¼ÓÇ¿»ù´¡ÖªÊ¶µÄÀí½âÓëÓ¦Óã¬Ìá¸ß½â¾öÎÊÌâÄÜÁ¦£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | µ¼Ïßµç×èԶСÓÚµçÈÈË¿µç×è | B£® | µ¼Ïßµç×èÔ¶´óÓÚµçÈÈË¿µç×è | ||
C£® | ͨ¹ýµ¼ÏߵĵçÁ÷±ÈµçÈÈ˿С | D£® | ͨ¹ýµ¼ÏߵĵçÁ÷±ÈµçÈÈË¿´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | 3mg | B£® | 4mg | C£® | 5mg | D£® | 6mg |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
A£® | ÔÚͬһµØµã£¬µ¥°Ú×ö¼òгÕñ¶¯µÄÖÜÆÚµÄƽ·½ÓëÆä°Ú³¤³ÉÕý±È | |
B£® | µ¯»ÉÕñ×Ó×ö¼òгÕñ¶¯Ê±£¬Õñ¶¯ÏµÍ³µÄÊÆÄÜÓ붯ÄÜÖ®ºÍ±£³Ö²»±ä | |
C£® | ÔÚͬһµØµã£¬µ±°Ú³¤²»±äʱ£¬°ÚÇòÖÊÁ¿Ô½´ó£¬µ¥°Ú×ö¼òгÕñ¶¯µÄÖÜÆÚԽС | |
D£® | ϵͳ×öÎȶ¨µÄÊÜÆÈÕñ¶¯Ê±£¬ÏµÍ³Õñ¶¯µÄƵÂʵÈÓÚÖÜÆÚÐÔÇý¶¯Á¦µÄƵÂÊ | |
E£® | ÒÑÖªµ¯»ÉÕñ×Ó³õʼʱ¿ÌµÄλÖü°ÆäÕñ¶¯ÖÜÆÚ£¬¾Í¿ÉÖªÕñ×ÓÔÚÈÎÒâʱ¿ÌÔ˶¯Ëٶȵķ½Ïò |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | Àã´Î×ܽá³öÁ˵ç´Å¸ÐÓ¦¶¨ÂÉ | B£® | ·¨ÀµÚ×îÏÈ·¢ÏÖµçÁ÷µÄ´ÅЧӦ | ||
C£® | ÃÜÁ¢¸ù×îÔç²â³öÁËÔªµçºÉeµÄÊýÖµ | D£® | ¿âÂ××îÏȹéÄɸÐÓ¦µçÁ÷µÄ·½Ïò |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
A£® | СÇòa¡¢bµÄÖÊÁ¿ma¡¢mb | |
B£® | СÇòa¡¢bµÄ°ë¾¶r | |
C£® | СÇòa¡¢b À뿪б²Û¹ìµÀÄ©¶ËºóƽÅ×·ÉÐÐʱ¼ät | |
D£® | ¼Ç¼ֽÉÏOµãµ½A¡¢B¡¢C¸÷µãµÄ¾àÀëOA¡¢OB¡¢OC |
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com