2£®¡°ÑéÖ¤»úеÄÜÊØºã¶¨ÂÉ¡±µÄʵÑé¿ÉÒÔ²ÉÓÃÈçͼµÄ¼×»òÒÒ·½°¸À´½øÐУ®
£¨1£©±È½ÏÕâÁ½ÖÖ·½°¸£¬¼×£¨Ñ¡Ìî¡°¼×¡±»ò¡°ÒÒ¡±£©·½°¸ºÃЩ£®
£¨2£©Í¼±ûÊÇijÖÖ·½°¸µÃµ½µÄÒ»ÌõÖ½´ø£¬²âµÃÿÁ½¸ö¼ÆÊýµã¼ä¾àÀëÈçͼ£¬ÒÑ֪ÿÁ½¸ö¼ÆÊýµãÖ®¼äµÄʱ¼ä¼ä¸ôT=0.1s£¬ÎïÌåÔ˶¯µÄ¼ÓËÙ¶Èa=4.83m/s2£¨±£Áô3λÓÐЧÊý×Ö£©£»
¸ÃÖ½´øÊDzÉÓÃÒÒ£¨Ñ¡Ìî¡°¼×¡±»ò¡°ÒÒ¡±£©ÊµÑé·½°¸µÃµ½µÄ£®
£¨3£©Èçͼ¶¡ÊDzÉÓü׷½°¸Ê±µÃµ½µÄÒ»ÌõÖ½´ø£¬ÔÚ¼ÆËãͼÖÐNµãËÙ¶Èʱ£¬¼¸Î»Í¬Ñ§·Ö±ðÓÃÏÂÁв»Í¬µÄ·½·¨½øÐУ¬ÆäÖÐÕýÈ·µÄÊÇCD
A£®vN=gnT
B£®vN=g£¨n-1£©T
C£®vN=$\frac{{d}_{n+1}-{d}_{n-1}}{2T}$
D£®vN=$\frac{{x}_{n}+{x}_{n+1}}{2T}$£®

·ÖÎö £¨1£©¸ù¾ÝʵÑéµÄÔ­ÀíºÍÖ÷ÒªÊÂÏîÅжÏÄĸö·½°¸ºÃЩ£®
£¨2£©¸ù¾ÝÁ¬ÐøÏàµÈʱ¼äÄÚÎ»ÒÆÖ®²îÊÇÒ»ºãÁ¿£¬ÔËÓÃÖð²î·¨Çó³ö¼ÓËÙ¶È£¬È·¶¨Ö½´øÊÇÓÉÄĸö·½°¸µÃµ½µÄ£®
£¨3£©¸ù¾Ýij¶Îʱ¼äÄ򵀮½¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó³öNµãµÄ˲ʱËÙ¶È£®

½â´ð ½â£º£¨1£©×ÔÓÉÂäÌåʵÑéÓëÐ±ÃæÐ¡³µÊµÑéÏà±È½Ï£¬×ÔÓÉÂäÌåʵÑé×èÁ¦½ÏС£¬¸Ã·½°¸ºÃЩ£®
£¨2£©¸ù¾Ý¡÷x=aT2£¬ÔËÓÃÖð²î·¨µÃ£¬a=$\frac{{x}_{3}+{x}_{4}-{x}_{1}-{x}_{2}}{4{T}^{2}}$=$\frac{£¨21.5+26.4-11.9-16.7£©¡Á1{0}^{-2}}{4¡Á0.01}$m/s2=4.83m/s2£®
ÓÉÓÚ×ÔÓÉÂäÌåʵÑé²úÉúµÄ¼ÓËÙ¶ÈÔ¼µÈÓÚg£¬¿ÉÖª¸ÃÖ½´øÊDzÉÓÃÒÒ·½°¸µÃµ½µÄ£®
£¨3£©¸ù¾Ýij¶Îʱ¼äÄ򵀮½¾ùËٶȵÈÓÚÖмäʱ¿ÌµÄ˲ʱËÙ¶ÈÇó³öNµãµÄËÙ¶È£¬¼´vN=$\frac{{d}_{n+1}-{d}_{n-1}}{2T}$»òvN=$\frac{{x}_{n}+{x}_{n+1}}{2T}$£¬²»Äܸù¾Ýv=gtÇó½âNµãµÄËÙ¶È£¬·ñÔò¾ÍĬÈÏÁË»úеÄÜÊØºã£¬Ê§È¥ÑéÖ¤µÄÒâÒ壮¹ÊÑ¡£ºCD£®
¹Ê´ð°¸Îª£º£¨1£©¼×¡¡£¨2£©4.83£¬ÒÒ¡¡£¨3£©CD

µãÆÀ Êé±¾ÉϵÄʵÑ飬ÎÒÃÇÒª´ÓʵÑéÔ­Àí¡¢ÊµÑéÒÇÆ÷¡¢ÊµÑé²½Ö衢ʵÑéÊý¾Ý´¦Àí¡¢ÊµÑé×¢ÒâÊÂÏîÕ⼸µãÈ¥¸ãÇå³þ£¬Í¬Ê±ÒªÊìÁ·Ó¦ÓÃËùѧ»ù±¾ÎïÀí֪ʶ½øÐÐÊý¾Ý´¦Àí£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

5£®Æ½ÐаåµçÈÝÆ÷Ëù´øµçºÉÁ¿QÊÇÖ¸£¨¡¡¡¡£©
A£®Á½¿é°åËù´øµçºÉÁ¿Ö®ºÍB£®ÆäÖÐÒ»¿é°åËù´øµçºÉÁ¿µÄ¾ø¶ÔÖµ
C£®Á½¿é°åËù´øµçºÉÁ¿µÄ¾ø¶ÔÖµÖ®ºÍD£®µçÈÝÆ÷ÿÃëÖÓÔö¼ÓµÄµçºÉÁ¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

13£®À´×ÔÖÊ×ÓÔ´µÄÖÊ×Ó£¨³õËÙ¶ÈΪÁ㣩£¬¾­Ò»Ö±Ïß¼ÓËÙÆ÷¼ÓËÙÐγÉϸÖùÐεÄÖÊ×ÓÁ÷ÇÒµçÁ÷ºã¶¨£¬¼Ù¶¨·Ö²¼ÔÚÖÊ×ÓÔ´µ½°ÐÖ®¼äµÄ¼ÓËٵ糡ÊǾùÔȵģ¬ÔÚÖÊ×ÓÊøÖÐÓëÖÊ×ÓÔ´Ïà¾àlºÍ4lµÄÁ½´¦¸÷ȡһºá½ØÃæS1ºÍS2£¬Éè´ÓÖÊ×ÓÔ´µ½S1¡¢S2µÄ¹ý³ÌÖУ¬Ä³ÖÊ×ÓÊܵ½µÄ³åÁ¿·Ö±ðΪI1¡¢I2£»ÔÚS1¡¢S2Á½´¦¸÷ȡһ¶Î¼«¶ÌµÄÏàµÈ³¤¶ÈµÄÖÊ×ÓÔ´£¬ÆäÖеÄÖÊ×ÓÊý·Ö±ðΪn1¡¢n2£¬Ôò£¨¡¡¡¡£©
A£®I1£ºI2=1£º2B£®I1£ºI2=1£º4C£®n1£ºn2=2£º1D£®n1£ºn2=4£º1

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

10£®ÈçͼËùʾ£¬ÖÊÁ¿ÎªmµÄÎï¿éA·ÅÔÚÐ±ÃæBÉÏ£¬Ð±ÃæBÖÊÁ¿ÎªM£¬Çã½ÇΪ¦È£¬Ë®Æ½Á¦F0£¨ÒÑÖª£©×÷ÓÃÔÚÎï¿éAÉÏ£¬A¡¢B¾ù±£³Ö¾²Ö¹×´Ì¬£®
£¨1£©Çó³öµØÃæ¶ÔBµÄÖ§³ÖÁ¦¼°Ä¦²ÁÁ¦µÄ´óСºÍ·½Ïò£»
£¨2£©½«B¹Ì¶¨£¬³·È¥F0£¬¶ÔAÊ©¼ÓÒ»ÊúÖ±Æ½ÃæÄÚµÄÀ­Á¦F£¬Ê¹AÑØÐ±ÃæÔÈËÙÏ»¬£¬ÇóÀ­Á¦FµÄ×îСֵ£¨ÒÑÖªABÖ®¼äµÄ¶¯Ä¦²ÁÒòÊýΪ¦Ì£¬ÇҦ̣¾tan¦È£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

17£®ÈËÔìµØÇòÎÀÐÇÔÚÔ²ÖܹìµÀÉÏÔËÐУ¬ÓÉÓÚÊܵ½¸ß¿ÕÏ¡±¡ÆøÌåµÄ×èÁ¦×÷Óã¬ÈƵØÇòÔËתµÄ¹ìµÀ°ë¾¶»á»ºÂý±äС£¬ÔòÎÀÐǵ썡¡¡¡£©
A£®»úеÄÜÖð½¥¼õС£¬ÏßËÙ¶ÈÖð½¥±äСB£®»úеÄÜÖð½¥¼õС£¬ÏßËÙ¶ÈÖð½¥±ä´ó
C£®»úеÄÜÖð½¥Ôö´ó£¬ÏßËÙ¶ÈÖð½¥±äСD£®»úеÄÜÖð½¥Ôö´ó£¬ÏßËÙ¶ÈÖð½¥Ôö´ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

7£®ÈçͼËùʾ£¬ÎªÒ»Í¬Ñ§ÔÚÀºÇò±ÈÈüÖÐͶ³öµÄÀºÇòÏȺ󾭹ýµÄA¡¢B¡¢CÈý¸öλÖã®ÆäÖÐBµãΪÀºÇòÉÏÉýµÄ×î¸ßµã£¬A¡¢BµãµÄ¸ß¶È²îÊÇB¡¢Cµã¸ß¶È²îµÄÁ½±¶£®²»¼ÆÒ»ÇÐ×èÁ¦£¬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®ÀºÇò´ÓAµãµ½BµãÖØÁ¦×öµÄ¹¦ÓëBµãµ½CµãÖØÁ¦×öµÄ¹¦Ïàͬ
B£®ÀºÇò´ÓAµãÔ˶¯µ½CµãµÄ¹ý³ÌÖУ¬ÀºÇòµÄ»úеÄÜÏÈÔö¼Óºó¼õÉÙ
C£®ÀºÇò´ÓAµãÔ˶¯µ½CµãµÄ¹ý³ÌÖУ¬¶¯ÄܺÍÖØÁ¦ÊÆÄܶ¼ÊÇÏÈÔö´óºó¼õС
D£®ÀºÇòÔÚBµãʱ£¬ÖØÁ¦µÄ˲ʱ¹¦ÂÊΪÁã

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ

14£®ÈçͼËùʾ£¬¾¢¶ÈϵÊýΪk1µÄÇᵯ»ÉÁ½¶Ë·Ö±ðÓëÖÊÁ¿Îªm1¡¢m2µÄÎï¿éA¡¢BË©½Ó£¬¾¢¶ÈϵÊýΪk2µÄÇᵯ»ÉÉ϶ËÓëÎï¿éBË©½Ó£¬Ï¶ËÓëÖÊÁ¿Îªm3µÄÎï¿éCË©½Ó£¬Õû¸öϵͳ´¦ÓÚÆ½ºâ״̬£¬ÏÖÊ©Á¦½«Îï¿éA»ºÂýÊúÖ±ÉÏÌᣬֱµ½Îï¿éC¸ÕÍÑÀë×ÀÃæ£¬Ôڴ˹ý³ÌÖÐÎï¿éBÉÏÉýµÄ¾àÀëΪ¶àÉÙ£¿Îï¿éAÉÏÉýµÄ¾àÀëΪ¶àÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ

11£®2015Äê±±¾©ÓëÕżҿÚÁªºÏÉê°ì¶¬¼¾°ÂÔ˻ᣬ¹úÈËÖõÄ¿¡¢ÍòÖÚÆÚÅΣ®¶¬¼¾°ÂÔË»á±ÈÈüÏîĿ֮һµÄ¡°ÌøÌ¨»¬Ñ©¡±£¬¿É¼ò»¯ÎªÈçͼËùʾµÄÄ£ÐÍ£¬ÖÊÁ¿Îª60kg µÄÔ˶¯Ô±Óɸߴ¦Ï»¬ºó´Óƽ̨ĩ¶ËAµãˮƽԾ³ö£¬ÂäÔÚˮƽµØÃæÉϵÄB´¦£®ÒÑÖªAµãÀëµØÃæ¸ß¶ÈH=20m£¬´ÓA µãˮƽԾ³öʱµÄËÙ¶ÈvA=30m/s£¬ºöÂÔÒ»ÇÐ×èÁ¦£¬È¡µØÃæÎªÁãÊÆÄÜ£¬g È¡10m/s2£®Çó£º
£¨1£©Ô˶¯Ô±ÔÚA µãµÄÖØÁ¦ÊÆÄÜEP£»
£¨2£©Ô˶¯Ô±ÔÚA µãˮƽԾ³öʱµÄ¶¯ÄÜEk£»
£¨3£©Ô˶¯Ô±´ÓA µãÔ˶¯µ½BµãµÄʱ¼ät£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ

12£®ÖÊÁ¿Îª50kgµÄÈË´Óһƽ̨ÉÏÌøÏ£¬ÏÂÂä2mºóË«½Å×ŵأ¬½Ó×ÅËûÓÃË«ÍÈÍäÇúµÄ·½·¨»º³å£¬Ê¹×ÔÉíµÄÖØÐÄÓÖϽµÁË0.5m£®¼ÙÉèµØÃæ¶ÔÈ˵Ä×÷ÓÃÁ¦ÎªºãÁ¦£¬Çó´ËÁ¦µÄ´óС£®£¨g=10m/s2£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸