·ÖÎö ¸ù¾ÝÁ¬ÐøÏàµÈʱ¼äÄÚµÄÎ»ÒÆÖ®²îÊÇÒ»ºãÁ¿£¬ÔËÓÃÖð²î·¨Çó³ö¼ÓËÙ¶È£¬¸ù¾Ýij¶Îʱ¼äÄ򵀮½¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó³öDµãµÄ˲ʱËÙ¶È£®
½â´ð ½â£ºÏàÁÚ¼ÆÊ±µã¼äµÄʱ¼ä¼ä¸ôΪ0.02s£¬Ã¿Á½µã¼ä»¹ÓÐ4¸öµãûÓл³öÀ´£¬ÔòÿÁ½¸ö¼ÆÊýµãµÄʱ¼ä¼ä¸ôΪ0.1s£®
¸ù¾Ý¡÷x=aT2µÃ£º${a}_{1}^{\;}=\frac{{s}_{6}^{\;}-{s}_{3}^{\;}}{3{T}_{\;}^{2}}$£¬${a}_{2}^{\;}=\frac{{s}_{4}^{\;}-{s}_{1}^{\;}}{3{T}_{\;}^{2}}$£¬${a}_{3}^{\;}=\frac{{s}_{4}^{\;}-{s}_{1}^{\;}}{3{T}_{\;}^{2}}$£¬
a=$\frac{{a}_{1}^{\;}+{a}_{2}^{\;}+{a}_{3}^{\;}}{3}$=$\frac{£¨{s}_{4}^{\;}+{s}_{5}^{\;}+{s}_{6}^{\;}£©-£¨{s}_{1}^{\;}+{s}_{2}^{\;}+{s}_{3}^{\;}£©}{9{T}_{\;}^{2}}$£¬
´úÈëÊý¾Ý½âµÃ£ºa=1.93m/s2£®
DµãµÄËÙ¶ÈΪ£º${v}_{D}^{\;}$=$\frac{{x}_{CE}^{\;}}{2T}$=$\frac{0.1081+0.1270}{0.2}m/s$¡Ö1.18m/s£®
Èç¹ûÔÚij´ÎʵÑéÖУ¬½»Á÷µçµÄƵÂÊΪ49Hz£¬ÄÇôʵ¼ÊÖÜÆÚ´óÓÚ0.02s£¬
¸ù¾ÝÔ˶¯Ñ§¹«Ê½¡÷x=at2µÃÕæÊµµÄ¼ÓËÙ¶ÈÖµ¾Í»áƫС£¬ËùÒÔ²âÁ¿µÄ¼ÓËÙ¶ÈÖµÓëÕæÊµµÄ¼ÓËÙ¶ÈÖµÏà±ÈÊÇÆ«´óµÄ£®
¹Ê´ð°¸Îª£º$\frac{£¨{s}_{4}^{\;}+{s}_{5}^{\;}+{s}_{6}^{\;}£©-£¨{s}_{1}^{\;}+{s}_{2}^{\;}+{s}_{3}^{\;}£©}{9{T}_{\;}^{2}}$ 1.93 1.18 ´ó
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÕÆÎÕÖ½´øµÄ´¦Àí·½·¨£¬»áͨ¹ýÖ½´øÇó½â˲ʱËٶȺͼÓËÙ¶È£¬¹Ø¼üÊÇÔȱäËÙÖ±ÏßÔ˶¯ÍÆÂÛµÄÔËÓã®
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ¿µÆÕ¶ÙЧӦ | |
| B£® | Ñô¹âÏÂÎå²Êçͷ׵ķÊÔíÅÝ | |
| C£® | ÃÐ×ÅÑÛ¾¦¿´ÈÕ¹âµÆ£¬ÄÜ¿´µ½²ÊÉ«ÌõÎÆ | |
| D£® | ¹âÕÕÉäµ½½ðÊô±íÃæ£¬½ðÊô±íÃæÓеç×ÓÒݳö |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | 6 m/s2 | B£® | 9m/s2 | C£® | 2m/s2 | D£® | 1m/s2 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ºÚÉ«µÄ¾¶¼£½«³öÏÖÔÚľ̿°üµÄÓÒ²à | |
| B£® | ľ̿°üµÄÖÊÁ¿Ô½´ó£¬¾¶¼£µÄ³¤¶ÈÔ½¶Ì | |
| C£® | ´«ËÍ´øÔ˶¯µÄËÙ¶ÈÔ½´ó£¬¾¶¼£µÄ³¤¶ÈÔ½¶Ì | |
| D£® | ľ̿°üÓë´«ËÍ´ø¼ä¶¯Ä¦²ÁÒòÊýÔ½´ó£¬¾¶¼£µÄ³¤¶ÈÔ½¶Ì |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | С³µ¿ªÊ¼×ö¼ÓËÙÔ˶¯£¬×îºó×ö¼õËÙÔ˶¯ | |
| B£® | С³µÔÚ¼õËÙÔ˶¯¹ý³ÌÖмÓËÙ¶ÈÒ»Ö±²»¶Ï±ä´ó | |
| C£® | С³µµÄÎ»ÒÆ¿ÉÄܵÈÓÚ6m | |
| D£® | С³µµÄÎ»ÒÆÒ»¶¨´óÓÚ7m |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | Á½µã¼äµçÊÆ²îΪ$\frac{2m{{V}_{0}}^{2}}{q}$ | |
| B£® | A£¬BÁ½µã¼äµÄ¸ß¶È²îΪ$\frac{{{V}_{0}}^{2}}{2g}$ | |
| C£® | ΢Á£ÔÚBµãµÄµçÊÆÄÜ´óÓÚÔÚAµãµÄµçÊÆÄÜ | |
| D£® | ´ÓAµ½B΢Á£×÷ÔȱäËÙÔ˶¯ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | 6¦¸ | B£® | 8¦¸ | C£® | 4¦¸ | D£® | 2¦¸ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | ËüÃÇ×öÔ²ÖÜÔ˶¯µÄ½ÇËÙ¶ÈÓëÆäµÄÖÊÁ¿³É·´±È | |
| B£® | ËüÃÇ×öÔ²ÖÜÔ˶¯µÄÖÜÆÚÓëÆäµÄÖÊÁ¿³É·´±È | |
| C£® | ËüÃÇËùÊÜÏòÐÄÁ¦ÓëÆäµÄÖÊÁ¿³É·´±È | |
| D£® | ËüÃÇ×öÔ²ÖÜÔ˶¯µÄ°ë¾¶ÓëÆäµÄÖÊÁ¿³É·´±È |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ²¼ÀÊÔ˶¯ÊÇÐü¸¡ÔÚÒºÌåÖйÌÌå¿ÅÁ£µÄ·Ö×Ó£®ÎÞ¹æÔòÔ˶¯µÄ·´Ó³ | |
| B£® | ûÓÐĦ²ÁµÄÀíÏëÈÈ»úÒ²²»¿ÉÄܰÑÎüÊÕµÄÄÜÁ¿È«²¿×ª»¯Îª»úеÄÜ | |
| C£® | ÖªµÀijÎïÖʵÄĦ¶ûÖÊÁ¿ºÍÃܶȿÉÇó³ö°¢·ü¼ÓµÂÂÞ³£Êý | |
| D£® | ÄÚÄܲ»Í¬µÄÎïÌ壬ËüÃÇ·Ö×ÓÈÈÔ˶¯µÄƽ¾ù¶¯ÄÜ¿ÉÄÜÏàͬ | |
| E£® | Èç¹ûÆøÌå·Ö×Ó×ÜÊý²»±ä£®¶øÆøÌåζÈÉý¸ß£¬ÆøÌå·Ö×ӵį½¾ù¶¯ÄÜÔö´óÒò´Ëѹǿ±ØÈ»Ôö´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - 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