ÌâÄ¿ÄÚÈÝ
16£®ÈçͼËùʾ£¬½¨Á¢xOy×ø±êϵ£¬ÆäÖÐxÖá´¦ÓÚˮƽ·½ÏòÉÏ£¬Á½Æ½Ðм«°åP¡¢Q´¹Ö±ÓÚyÖáÇÒ¹ØÓÚxÖá¶Ô³Æ£¬¼«°å³¤¶ÈºÍ¼«°å¼ä¾à¾ùΪl£¬Éϼ«°å´ø¸ºµç£®µÚÒ»¡¢ËÄÏóÏÞÓз½Ïò´¹Ö±ÓÚxOyƽÃæÏòÀïµÄ´Å¸ÐӦǿ¶È´óСΪBµÄÔÈÇ¿´Å³¡ºÍÒ»ÔÈÇ¿µç³¡£®Î»ÓÚ¼«°å×ó²àµÄÁ£×ÓÔ´ÑØxÖáÏòÓÒ·¢ÉäÒ»¸öÖÊÁ¿Îªm¡¢´øÕýµçµÄµçºÉÁ¿ÎªqµÄСÇò£¬ÒÑÖª´øµçСÇò¾t0ʱ¼ä´Ó¼«°åϱßÔµÉäÈë´Å³¡£¬È»ºóÔڴų¡ÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£®Ç󣺣¨1£©µÚÒ»¡¢ËÄÏóÏÞÖÐÔÈÇ¿µç³¡µÄ´óСºÍ·½Ïò£®
£¨2£©Á½¼«°åËù¼ÓµÄµçѹµÄ´óС£®
£¨3£©´øµçСÇòÔÚµÚÒ»¡¢ËÄÏóÏÞÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯µÄ°ë¾¶£®
·ÖÎö 1£©ÓÉ´øµçСÇòÔڴų¡ÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯¿ÉÖª£¬Ð¡ÇòÊܵ½µÄµç³¡Á¦Ò»¶¨ÓëÖØÁ¦´óСÏàµÈ£¬·½ÏòÏà·´£¬Óɴ˼´¿ÉÇóµÃµç³¡Ç¿¶ÈµÄ´óСÓë·½Ïò£»
£¨2£©½øÈëÁ½¼«°åµÄ´øµçСÇòÔڵ糡ÖÐ×öÀàƽÅ×Ô˶¯£®ÓÉÌâÖªµÀx·½ÏòλÒÆΪl£¬y·½ÏòλÒÆΪ$\frac{l}{2}$£¬ÔËÓÃÔ˶¯µÄ·Ö½â£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂɺÍÔ˶¯Ñ§¹«Ê½Çó½âÁ½¼«°åËù¼ÓµÄµçѹµÄ´óС£®
£¨3£©Ð¡Çò½øÈë´Å³¡ÖУ¬ÂåÂ××ÈÁ¦ÌṩÏòÐÄÁ¦£¬Çó³öÁ£×ÓÔڴų¡ÖÐ×öÔ²ÖÜÔ˶¯µÄ°ë¾¶£®
½â´ð ½â£º£¨1£©ÓÉ´øµçСÇòÔÚµÚÒ»ËÄÏóÏÞÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯¿ÉÖª£¬Ð¡ÇòÔÚµÚÒ»¡¢ËÄÏóÏÞÖÐËùÊܵÄÖØÁ¦ºÍµç³¡Á¦´óСÏàµÈ£¬·½ÏòÏà·´£¬¼´mg=qE£¬
½âµÃµç³¡Ç¿¶È´óСE=$\frac{mg}{q}$£¬µç³¡Ç¿¶ÈµÄ·½ÏòÊúÖ±ÏòÉÏ£®
£¨2£©´øµçСÇòÔÚÁ½¼«°å¼äÔ˶¯Ê±£¬ÓУº$\frac{l}{2}=\frac{1}{2}a{{t}_{0}}^{2}$£¬
a=$\frac{mg-q\frac{U}{l}}{m}$£®
½âµÃËùÇóµÄµçѹU=$\frac{mgl{{t}_{0}}^{2}-m{l}^{2}}{q{{t}_{0}}^{2}}$£®
£¨3£©Ð¡ÇòÔڴų¡ÖÐÔ˶¯Ê±ÓÐ$qvB=m\frac{{v}^{2}}{R}$£¬
$v=\sqrt{{{v}_{0}}^{2}+{{v}_{y}}^{2}}$£¬
${v}_{0}=\frac{l}{{t}_{0}}$£¬vy=at0£®
½âµÃ°ë¾¶R=$\frac{\sqrt{2}ml}{Bq{t}_{0}}$£®
´ð£º£¨1£©µÚÒ»¡¢ËÄÏóÏÞÖÐÔÈÇ¿µç³¡µÄ´óСΪ$\frac{mg}{q}$£¬µç³¡Ç¿¶ÈµÄ·½ÏòÊúÖ±ÏòÉÏ£®
£¨2£©Á½¼«°åËù¼ÓµÄµçѹµÄ´óСΪ$\frac{mgl{{t}_{0}}^{2}-m{l}^{2}}{q{{t}_{0}}^{2}}$£®
£¨3£©´øµçСÇòÔÚµÚÒ»¡¢ËÄÏóÏÞÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯µÄ°ë¾¶Îª$\frac{\sqrt{2}ml}{Bq{t}_{0}}$£®
µãÆÀ ¿¼²éÁË¿¼Éú·ÖÎö¡¢ÍÆÀíºÍ×ÛºÏÄÜÁ¦£¬ÊÔÌâÉæ¼°µÄ֪ʶµã½Ï¶à£¬µ«Ö»ÒªÈÏÕæ·ÖÎöÎïÀí¹ý³Ì£¬ÕÒ×¼ÎïÀí¹ý³Ì¶ÔÓ¦µÄÎïÀí¹æÂÉ£¬»¹ÊÇÈÝÒ×Çó½â£®
A£® | 0¡«t0ʱ¼äÄÚ£¬Á÷¹ýRµÄµçÁ÷·½ÏòÓÉC¡úD | |
B£® | t0¡«2t0ʱ¼äÄÚ£¬Á÷¹ýRµÄµçÁ÷·½ÏòÓÉD¡úC | |
C£® | 0¡«t0ʱ¼äÄÚ£¬²»¼ÆCD±ßµçÁ÷Ó°Ï죬ÔòAB±ßËùÊÜ°²ÅàÁ¦µÄ·½ÏòÏò×ó | |
D£® | t0¡«2t0ʱ¼äÄÚ£¬²»¼ÆCD±ßµçÁ÷Ó°Ï죬ÔòAB±ßËùÊÜ°²ÅàÁ¦µÄ·½ÏòÏòÓÒ |
A£® | ¸±ÏßȦÖеçÁ÷µÄ·½ÏòÿÃë¸Ä±ä20´Î | B£® | Á÷¾Ô¡¢¸±ÏßȦµÄµçÁ÷Ö®±ÈΪ5£º1 | ||
C£® | µçѹ±íVµÄʾÊýΪ40V | D£® | ÔÏßȦµÄÊäÈ빦ÂÊΪ20W |
A£® | R0Éϵĵçѹ±äС | |
B£® | R2Éϵĵçѹ±ä´ó | |
C£® | R1Éϵĵçѹ±ä´ó | |
D£® | R1Éϵçѹ±ä»¯Á¿´óÓÚR0Éϵĵçѹ±ä»¯Á¿ |
´Ó¿Ì¶È³ßÉ϶Á³öDEÁ½µã¼äµÄ¾àÀëΪ1.80cm£¬¼ÆËãС³µÔÚ²£Á§°åÉÏ×öÔÈËÙÔ˶¯µÄËٶȴóСΪ0.9m/s£¬Ð¡³µÔÚ²¼ÃæÉÏÔ˶¯µÄ¼ÓËٶȴóСΪ5m/s2£®£¨ËٶȺͼÓËٶȵļÆËã½á¹û±£ÁôһλÓÐЧÊý×Ö£©
£¨2£©Ä³Í¬Ñ§ÁíÍâÉè¼ÆÁËÒ»¸ö²âÁ¿ÎïÌå˲ʱËٶȵÄʵÑ飬Æä×°ÖÃÈçͼ±û£¬ÔÚС³µÉϹ̶¨µ²¹âƬ£¬½«¹âµçÃÅ´«¸ÐÆ÷¹Ì¶¨ÔÚ¹ìµÀÃ棬µæ¸ß¹ìµÀµÄÒ»¶Ë£¬Ñ¡Ôñ²»Í¬¿í¶ÈµÄµ²¹âƬºó£¬¸Ãͬѧ·Ö±ð½«Ð¡³µ´Óµæ¸ß¶ËͬһλÖÃÓɾ²Ö¹ÊÍ·Å£¬»ñµÃÁËÈç±íÖм¸×éʵÑéÊý¾Ý£¬ÔòÒÔϱíÊöÕýÈ·µÄÊÇD
ʵÑé´ÎÊý | µÚÒ»´Î | µÚ¶þ´Î | µÚÈý´Î | µÚËÄ´Î |
²»Í¬µÄµ²¹âƬ | ¢ñ | ¢ò | ¢ó | ¢ô |
ͨ¹ý¹âµçÃŵÄʱ¼ä£¨s£© | 0.23044 | 0.17464 | 0.11661 | 0.05850 |
Ëٶȣ¨m/s£© | 0.347 | 0.344 | 0.343 | 0.342 |
¢ÚËĸöµ²¹âƬÖУ¬µ²¹âƬ¢ôµÄ¿í¶È×îС
¢ÛËÄ´ÎʵÑéÖУ¬µÚÒ»´ÎʵÑé²âµÃµÄËÙ¶È×î½Ó½üС³µ³µÍ·µ½´ï¹âµçÃÅʱµÄ˲ʱËÙ¶È
¢ÜËÄ´ÎʵÑéÖУ¬µÚËÄ´ÎʵÑé²âµÃµÄËÙ¶È×î½Ó½üС³µ³µÍ·µ½´ï¹âµçÃÅʱµÄ˲ʱËٶȣ®
A£®¢Ù¢ÛB£®¢Ú¢ÛC£®¢Ù¢ÜD£®¢Ú¢Ü
A£® | ÇâÔ×ÓÎüÊÕÒ»¸ö¹â×ÓԾǨµ½¼¤·¢Ì¬ºó£¬ÔÙÏòµÍÄܼ¶Ô¾Ç¨Ê±·Å³ö¹â×ÓµÄƵÂÊ¿ÉÄÜСÓÚÔÎüÊÕ¹â×ÓµÄƵÂÊ | |
B£® | µ±ÓÃÀ¶É«¹âÕÕÉäij½ðÊô±íÃæʱÓеç×ÓÒç³ö£¬Ôò¸ÄÓúì¹âÕÕÉäʱҲһ¶¨»áÓеç×ÓÒç³ö | |
C£® | ÌìÈÈ·ÅÉäÏÖÏó˵Ã÷Ô×ÓºËÄÚ²¿Óи´ÔӵĽṹ | |
D£® | ${\;}_{90}^{232}$Th±äΪ${\;}_{82}^{208}$PbÒª¾¹ý6´Î¦ÁË¥±äºÍ2´Î¦ÂË¥±ä |