ÌâÄ¿ÄÚÈÝ
14£®Èçͼ1ÊDzⶨˮƽÃæºÍСÎï¿éÖ®¼äµÄ¶¯Ä¦²ÁÒòÊýµÄʵÑé×°Öã¬ÇúÃæABÓëˮƽÃæÏàÇÐÓëBµãÇҹ̶¨£¬´øÓÐÕÚ¹âÌõµÄСÎï¿é×ÔÇúÃæÉÏijһµã¾²Ö¹ÊÍ·Å£¬×îÖÕÍ£ÁôÔÚˮƽÃæÉÏCµã£¬PΪ¹âµç¼ÆʱÆ÷µÄ¹âµçÃÅ£¬ÒÑÖªµ±µØÖØÁ¦¼ÓËÙ¶ÈΪg£¬£¨1£©ÀûÓÃÓα꿨³ß²âµÃÕÚ¹âÌõµÄ¿í¶ÈÈçͼ2Ëùʾ£¬ÔòÕÚ¹âÌõµÄ¿í¶Èd=0.955cm£»
£¨2£©ÊµÑéÖгýÁ˲ⶨÕÚ¹âÌõµÄ¿í¶ÈÍ⣬»¹±ØÐè²âÁ¿µÄÎïÀíÁ¿ÓÐBC£®
A£®Ð¡Îï¿éÖÊÁ¿m
B£®ÕÚ¹âÌõͨ¹ý¹âµçÃŵÄʱ¼ät
C£®¹âµçÃŵ½CµãµÄ¾àÀë
D£®Ð¡Îï¿éÊͷŵãµÄ¸ß¶Èh
£¨3£©ÎªÁ˼õСʵÑéÎó²î£¬Ä³Í¬Ñ§²ÉÓÃͼÏó·¨À´´¦ÀíʵÑéÊý¾Ý£¬Í¼ÏóÈçͼ3Ëùʾ£¬ÒÑÖª¸ÃͼÏßµÄбÂÊΪk£¬Ôò¿ÉÇó³öˮƽÃæÓëСÎï¿éÖ®¼äµÄ¶¯Ä¦²ÁÒòÊý¦Ì=$\frac{k{d}^{2}}{2g}$£¨ÓÃÉÏ£¨1£©£¨2£©Á½Ð¡Ìâ²âÁ¿µÄÎïÀíÁ¿×Öĸ¼°k±íʾ£©
·ÖÎö £¨1£©Óα꿨³ßµÄ¶ÁÊýʱÏȶÁ³öÖ÷³ßµÄ¿Ì¶È£¬È»ºó¿´Óαê³ßÉϵÄÄÄÒ»¸ö¿Ì¶ÈÓëÖ÷³ßµÄ¿Ì¶È¶ÔÆ룬×îºó¶Á³ö×ܶÁÊý£»
£¨2£©¸ù¾ÝÌâÄ¿µÄÐðÊö£¬È·¶¨ÊµÑéµÄÔÀí£¬È»ºóÈ·¶¨´ý²âÁ¿ÓëĦ²ÁÁ¦µÄ¹«Ê½£»
£¨3£©¸ù¾ÝʵÑéµÄÔÀíÈ·¶¨´¦$\frac{1}{{t}^{2}}$ÓësµÄ¹Øϵ£¬Ð±ÂÊΪk£¬¼´¿ÉÇóµÃĦ²ÁÒòÊý
½â´ð ½â£º£¨1£©Ö÷³ßµÄ¿Ì¶È£º9cm£¬Óαê³ßÉϵĵÚ11¸ö¿Ì¶ÈÓëÖ÷³ßµÄ¿Ì¶È¶ÔÆ룬¶ÁÊýÊÇ£º0.05¡Á11=0.55mm£¬
×ܶÁÊý£º9mm+0.55mm=9.55mm£»
£¨2£©ÊµÑéµÄÔÀí£º¸ù¾ÝÕÚ¹âÌõµÄ¿í¶ÈÓ뻬¿éͨ¹ý¹âµçÃŵÄʱ¼ä¼´¿ÉÇóµÃ»¬¿éµÄËٶȣºv=$\frac{d}{t}$£»
Bµ½CµÄ¹ý³ÌÖУ¬Ä¦²ÁÁ¦×ö¹¦£¬¸ù¾Ý¶¯Äܶ¨ÀíµÃ£º-¦Ìmgs=0-$\frac{1}{2}$mv2£»
ÁªÁ¢ÒÔÉÏÁ½¸ö¹«Ê½µÃ¶¯Ä¦²ÁÒòÊýµÄ±í´ïʽ£º¦Ì=$\frac{{d}^{2}}{2gs{t}^{2}}$£»
»¹ÐèÒª²âÁ¿µÄÎïÀíÁ¿ÊÇ£º¹âµçÃÅPÓëCÖ®¼äµÄ¾àÀës£¬ÓëÕÚ¹âÌõͨ¹ý¹âµçÃŵÄʱ¼ät£¬¹ÊBCÕýÈ·£¬AD´íÎó£®
£¨3£©¸ù¾Ý¶¯Äܶ¨Àí¿ÉµÃ£º-¦Ìmgs=0-$\frac{1}{2}$mv2½âµÃs=$\frac{1}{{t}^{2}}=\frac{2¦Ìg}{{d}^{2}}s$£¬Ð±ÂÊk=$\frac{2¦Ìg}{{d}^{2}}$£¬¹Ê$¦Ì=\frac{k{d}^{2}}{2g}$
¹Ê´ð°¸Îª£º£¨1£©0.955£¨2£©BC£¨3£©$\frac{k{d}^{2}}{2g}$
µãÆÀ ±¾Ìâͨ¹ý¶¯Äܶ¨ÀíµÃ³ö¶¯Ä¦²ÁÒòÊýµÄ±í´ïʽ£¬´Ó¶øÈ·¶¨Òª²âÁ¿µÄÎïÀíÁ¿£®ÒªÏÈÈ·¶¨ÊµÑéµÄÔÀí£¬È»ºóÒÀ¾ÝʵÑéµÄÔÀí½â´ð¼´¿É
A£® | ϵͳ×öÔÈËÙÖ±ÏßÔ˶¯ | |
B£® | F=40N | |
C£® | бÃæÌå¶ÔШÐÎÎïÌåµÄ×÷ÓÃÁ¦FN=$\sqrt{2}$N | |
D£® | Ôö´óÁ¦F£¬Ð¨ÐÎÎïÌ彫Ïà¶ÔбÃæÌåÑØбÃæÏòÉÏÔ˶¯ |
A£® | ÎïÌåµÄ¶¯Á¿ÎªÁ㣬ÔòÎïÌåÒ»¶¨´¦ÓÚƽºâ״̬ | |
B£® | ÖÊÁ¿²»±äµÄÎïÌ壬ËٶȲ»±ä£¬ÔòÎïÌåµÄ¶¯Á¿Ò»¶¨²»±ä | |
C£® | ÎïÌåµÄ¶¯Á¿²»±ä£¬ÔòÎïÌåµÄ¶¯ÄÜÒ»¶¨²»±ä | |
D£® | ÎïÌåµÄºÏÍâÁ¦²»±ä£¬Ôò¶¯Á¿µÄ±ä»¯ÂÊÒ»¶¨²»±ä |
A£® | Ëü¿ÉÒÔÔÚµØÃæÉÏÈÎÒâµãµÄÕýÉÏ·½£¬ÇÒÀëµØÐĵľàÀë¿É¸ù¾ÝÐèÒª½øÐÐÑ¡Ôñ | |
B£® | Ëü¿ÉÒÔÔÚµØÃæÉÏÈÎÒâµãµÄÕýÉÏ·½£¬µ«ÀëµØÐĵľàÀëÊÇÒ»¶¨µÄ | |
C£® | ËüÖ»ÄÜÔÚ³àµÀµÄÕýÉÏ·½£¬µ«ÀëµØÐĵľàÀë¿É¸ù¾ÝÐèÒª½øÐÐÑ¡Ôñ | |
D£® | ËüÖ»ÄÜÔÚ³àµÀµÄÕýÉÏ·½£¬ÇÒÀëµØÐĵľàÀëÊÇÒ»¶¨µÄ |
A£® | ¸ÐÓ¦µçÁ÷Ϊ˳ʱÕë·½Ïò£¬Á½°ôÏ໥¿¿½ü | |
B£® | ¸ÐÓ¦µçÁ÷Ϊ˳ʱÕë·½Ïò£¬Á½°ôÏ໥ԶÀë | |
C£® | ¸ÐÓ¦µçÁ÷ΪÄæʱÕë·½Ïò£¬Á½°ôÏ໥¿¿½ü | |
D£® | ¸ÐÓ¦µçÁ÷ΪÄæʱÕë·½Ïò£¬Á½°ôÏ໥ԶÀë |
A£® | СÇòµÄ¶¯ÄÜÏȱä´óºó±äС | B£® | СÇòËÙ¶È×î´óʱÊܵ½µÄµ¯Á¦Îª2N | ||
C£® | СÇòµÄ»úеÄÜÏÈÔö´óºó¼õС | D£® | СÇòÊܵ½µÄ×î´óµ¯Á¦Îª12.2N |
A£® | ÎïÌåµÄËÙ¶ÈΪÁãʱ£¬ÎïÌå´¦ÓÚƽºâ״̬ | |
B£® | ÎïÌåÓÐÊúÖ±ÏòÉϵļÓËٶȣ¬ÔòÎïÌå´¦ÓÚ³¬ÖØ״̬ | |
C£® | ÎïÌå×ÔÓÉÏÂÂäʱ£¬ÎïÌå¶ÔµØÇòûÓÐ×÷ÓÃÁ¦ | |
D£® | Ô˶¯ÎïÌåÈôûÓÐÊܵ½ÍâÁ¦µÄ×÷Óã¬ËٶȽ«Öð½¥¼õС£¬Ö±ÖÁÍ£Ö¹ |