·ÖÎö £¨1£©¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÇó³öÁ£×ÓµÚn´Î½øÈë´Å³¡Ê±µÄ°ë¾¶RnÓëËٶȵĹØÏµÊ½£¬ÓÉÌâ¸øÌõ¼þÑо¿Á£×ÓµÚ2´Î½øÈë´Å³¡Ê±µÄËÙ¶È£¬¼´Á£×ÓµÚÒ»´Î¾¹ýµç³¡µÄ¹ý³ÌµÄÄ©ËÙ¶È£¬
£¨3£©¸ù¾Ý¶¯Äܶ¨ÀíÇó½âÁ£×ÓµÚÒ»´Î¾¹ýµç³¡µÄ¹ý³ÌÖе糡Á¦Ëù×öµÄ¹¦W1£®
£¨2£©¸ù¾ÝµÚ£¨1£©ÎʵĽá¹û¿ÉÖªÁ£×ÓµÚn+1´Î½øÈë´Å³¡Ê±ºÍµÚn´Î½øÈë´Å³¡Ê±µÄËÙ¶È£¬¼´µÚn´Î½øÈëµç³¡Ê±ºÍ´©³öµç³¡Ê±µÄËÙ¶È£¬¸ù¾Ý¶¯Äܶ¨ÀíÇó³öÁ£×ÓµÚn´Î¾¹ýµç³¡Ê±µç³¡Ç¿¶ÈµÄ´óСEn£®
½â´ð ½â£º£¨1£©ÉèÁ£×ÓµÚn´Î½øÈë´Å³¡Ê±µÄ°ë¾¶Îª${R}_{n}^{\;}$£¬ËÙ¶ÈΪ${v}_{n}^{\;}$£¬ÓÉÅ£¶ÙµÚ¶þ¶¨Âɵãº
$q{v}_{n}^{\;}B=m\frac{{v}_{n}^{2}}{{R}_{n}^{\;}}$¢Ù
ÓÉ¢ÙʽµÃ£º${v}_{n}^{\;}=\frac{qB{R}_{n}^{\;}}{m}$¢Ú
ÒòΪ${R}_{2}^{\;}=2{R}_{1}^{\;}$£¬¢Û
ËùÒÔÓÐ${v}_{2}^{\;}=2{v}_{1}^{\;}$¢Ü
£¨2£©¶ÔÁ£×ÓµÚÒ»´ÎÔڴų¡ÖÐÔ˶¯µÄ¹ý³Ì£¬
Óɶ¯Äܶ¨ÀíµÃ£º${W}_{1}^{\;}=\frac{1}{2}m{v}_{2}^{2}-\frac{1}{2}m{v}_{1}^{2}$=$\frac{1}{2}m£¨2{v}_{1}^{\;}£©_{\;}^{2}-\frac{1}{2}m{v}_{1}^{2}=\frac{3}{2}m{v}_{1}^{2}$¢Ý
£¨3£©Á£×ÓµÚn´Î½øÈëµç³¡µÄËÙ¶ÈΪ${v}_{n}^{\;}$£¬´©³öµç³¡Ê±ËÙ¶ÈΪ${v}_{n+1}^{\;}$£¬
ÓÉÌâÒâÖª£º${v}_{n}^{\;}=n{v}_{1}^{\;}$£¬${v}_{n+1}^{\;}=£¨n+1£©{v}_{1}^{\;}$¢Þ
Óɶ¯Äܶ¨ÀíµÃ£º$q{E}_{n}^{\;}d=\frac{1}{2}m{v}_{n+1}^{2}-\frac{1}{2}m{v}_{n}^{2}$¢ß
ÁªÁ¢½âµÃ£º${E}_{n}^{\;}=\frac{£¨2n+1£©m{v}_{1}^{2}}{2qd}$¢à
´ð£º£¨1£©Á£×ÓµÚ¶þ´Î½øÈë´Å³¡Ê±µÄËÙ¶È$2{v}_{1}^{\;}$£»
£¨2£©Á£×ÓµÚÒ»´Î¾¹ýµç³¡µÄ¹ý³ÌÖе糡Á¦Ëù×öµÄ¹¦${W}_{1}^{\;}$Ϊ$\frac{3}{2}m{v}_{1}^{2}$£»
£¨3£©Á£×ÓµÚn´Î¾¹ýµç³¡Ê±µç³¡Ç¿¶ÈµÄ´óС${E}_{n}^{\;}$Ϊ$\frac{£¨2n+1£©m{v}_{1}^{2}}{2qd}$
µãÆÀ ±¾Ìâ¹Ø¼üÊdzä·ÖÓ¦ÓÃÌâ¸øÌõ¼þÑо¿Á£×ÓµÚn´Î½øÈëµç³¡Ê±µÄËÙ¶È£¬´©³öµç³¡Ê±ËÙ¶È£®¶¯Äܶ¨ÀíÊǹ¦³£Óõķ½·¨£®
| 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£ºÑ¡ÔñÌâ
| A£® | ϸÏß¶ÔËüÒ»¶¨ÓÐÀÁ¦×÷Óà | B£® | ϸÏß¿ÉÄܶÔËüûÓÐÀÁ¦×÷Óà | ||
| C£® | Ð±Ãæ¶ÔËü¿ÉÄÜÓÐÖ§³ÖÁ¦×÷Óà | D£® | Ð±Ãæ¶ÔËüÒ»¶¨ÓÐÖ§³ÖÁ¦×÷Óà |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | µ±F=2Nʱ£¬AÎï¿éºÍľ°å¿ªÊ¼Ïà¶Ô»¬¶¯ | |
| B£® | µ±F=1N£¬ÔòA¡¢BÁ½Îï¿é¶¼Ïà¶Ôľ°å¾²Ö¹²»¶¯ | |
| C£® | ÈôF=4N£¬ÔòBÎï¿éËùÊÜĦ²ÁÁ¦´óСΪ$\frac{4}{3}$N | |
| D£® | ÈôF=6N£¬ÔòBÎï¿éµÄ¼ÓËÙ¶È´óСΪ$\frac{2}{3}$m/s2 |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ¾¹ýaµãʱ£¬È˵ÄËÙ¶È×î´ó | B£® | ¾¹ýbµãʱ£¬È˵ÄËÙ¶È×î´ó | ||
| C£® | ´Óaµãµ½bµã£¬È˵ļÓËÙ¶ÈÔÚÔö´ó | D£® | ´Óbµãµ½cµã£¬È˵ļÓËÙ¶ÈÔÚÔö´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
| ´ú±í·ûºÅ | L0 | Lx | L1 | L2 | L3 | L4 | L5 | L6 |
| ÊýÖµ£¨cm£© | 25.35 | 27.35 | 29.35 | 31.30 | 33.4 | 35.35 | 37.40 | 39.30 |
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