ÌâÄ¿ÄÚÈÝ
17£®¡°Ì½¾¿¼ÓËÙ¶ÈÓëÎïÌåÖÊÁ¿¡¢ÎïÌåÊÜÁ¦µÄ¹Øϵ¡±µÄʵÑéÖУ¬¼×¡¢ÒÒÁ½Î»Í¬Ñ§ÊµÑéʱ¶¼ÏÈÕýȷƽºâĦ²ÁÁ¦£¬¼×ÔÚʵÑéʱÓÃϸÏßÒ»¶ËÁ¬½ÓС³µ£¬ÁíÒ»¶ËÁ¬½Ó¹³Â룬¹³ÂëµÄÖØÁ¦×÷ΪϸÏßÉϵÄÀÁ¦£¬Èçͼ¼×Ëùʾ£¬ÒÒͬѧÀûÓù³ÂëºÍС³µÖ®¼äÁ¬½ÓµÄÁ¦´«¸ÐÆ÷²â³öϸÏßÉϵÄÀÁ¦ÈçͼÒÒËùʾ£¬Á½Î»Í¬Ñ§Í¨¹ý¸Ä±ä¹³ÂëµÄ¸öÊý£¬È·¶¨¼ÓËÙ¶ÈÓëϸÏßÉÏÀÁ¦FµÄ¹Øϵ£¨1£©Îª¼õСʵÑéÎó²î£¬¼×ͬѧÔÚʵÑé¹ý³ÌÖУ¬Ð¡³µµÄÖÊÁ¿Òª£¾£¾£¨Ìî¡°£¾¡±»ò¡°£¼¡±£©¹³ÂëµÄÖÊÁ¿£¬ÒÒͬѧÔÚʵÑé¹À²âÖУ¬²»ÐèÒª£¨Ìî¡°ÐèÒª¡±»ò¡°²»ÐèÒª¡±£©Âú×ãÕâ¸öÌõ¼þ
£¨2£©¼×¡¢ÒÒÁ½Î»Í¬Ñ§ÔÚʵÑéÖвÉÓÃÏàͬÖÊÁ¿µÄС³µ£¬½«¼×¡¢ÒÒÁ½Î»Í¬Ñ§µÃµ½µÄʵÑéÊý¾ÝÔÚͬһ×ø±êϵÖÐ×÷³öa-FͼÏó£¬Èçͼ±ûËùʾͼÏߢ٢ڣ¬ÆäÖÐͼÏߢÙÊÇÒÒͬѧËù×÷³öµÄͼÏó£¬Í¼ÏߢÚÊÇͬѧËù×÷³öµÄͼÏó£®Í¼ÏóÖÐËæ×ÅFµÄÔö´ó£¬Í¼Ïߢڽ«·¢ÉúÍäÇú£®
·ÖÎö £¨1£©£©¼×ʵÑéʱ£¬ÎªÁËʹÉþ×ÓµÄÀÁ¦µÈÓÚС³µµÄºÏÁ¦£¬ÐèҪƽºâĦ²ÁÁ¦£¬ÎªÁËʹ¹³ÂëµÄÖØÁ¦µÈÓÚÉþ×ÓµÄÀÁ¦£¬Ó¦Âú×ã¹³ÂëµÄÖÊÁ¿Ô¶Ð¡ÓÚС³µµÄÖÊÁ¿£®ÒÒʵÑéÖÐϸÏßÀÁ¦µÈÓÚÁ¦´«¸ÐÆ÷µÄ¶ÁÊý£¬ËùÒÔ¶Ô¹³ÂëÖÊÁ¿ºÍС³µÖÊÁ¿Ã»ÓÐÒªÇó£»
£¨2£©µ±¼ÓËÙ¶ÈÏàͬʱ£¬Á½Ð¡³µµÄºÏÁ¦Ïàͬ£¬¼´Ï¸ÏßÀÁ¦Ïàͬ£¬µ«ÊǼ×ʵÑéÓù³ÂëµÄÖØÁ¦´úÌæϸÏßÀÁ¦£¬¹³ÂëÖØÁ¦´óÓÚϸÏßµÄÀÁ¦£¬¶øÒÒʵÑéÖд«¸ÐÆ÷µÄ¶ÁÊýµÈÓÚϸÏßÀÁ¦£¬ËùÒÔ¼ÓËÙ¶ÈÏàͬʱ£¬¼×ʵÑéµÄF´ó£¬´Ó¶øÅжÏÁ½Î»Í¬Ñ§Ëù×÷ͼÏó£»Ö»Óм×ʵÑéÖУ¬Ëæ׏³ÂëÖÊÁ¿µÄÔö¼Ó£¬²»ÔÙÂú×ãʵÑéС³µÖÊÁ¿Ô¶´óÓÚ¹³ÂëÖÊÁ¿£¬Í¼Ïó»á·¢ÉúÍäÇú£®
½â´ð ½â£º£¨1£©¼×ͬѧµÄʵÑéÖÐС³µÊµ¼ÊÊܵ½µÄºÏÍâÁ¦ÎªÏ¸ÏßµÄÀÁ¦£¬ÒªÊ¹Ï¸ÏßµÄÀÁ¦½üËƵÈÓÚ¹³ÂëµÄÖØÁ¦£¬¼ÓËÙ¶ÈÓ¦¸ÃÒª¾¡Á¿Ð¡Ð©£¬ÓÉ$a=\frac{mg}{M+m}=\frac{g}{\frac{M}{m}+1}$£¬µ±M£¾£¾mʱ£¬a¡Ö0£®ÒÒͬѧʵÑé·½°¸ÖУ¬Á¦´«¸ÐÆ÷²âµÃµÄÀÁ¦¾ÍÊÇС³µËùÊܵĺÏÍâÁ¦£¬¹Ê¶ÔС³µºÍ¹³ÂëÖÊÁ¿µÄ´óС¹ØϵûÓÐÒªÇó£®
£¨2£©µ±¼×¡¢ÒÒÁ½ÊµÑéÖÐС³µµÄ¼ÓËÙ¶ÈÏàͬʱ£¬Ï¸ÏßµÄÀÁ¦ÎªºÏÍâÁ¦£¬´«¸ÐÆ÷²â³öµÄ¾ÍÊÇϸÏßµÄÀÁ¦£¬¶ø¹³ÂëµÄÖØÁ¦´óÓÚϸÏßµÄÀÁ¦£¬¼´µ±¼ÓËÙ¶ÈÏàͬʱ£¬¼×µÄFÖµ´óÓÚÒÒµÄFÖµ£¬¹ÊͼÏߢÚÊǼ×ͬѧËù×÷³öµÄͼÏó£¬Í¼ÏߢÙÊÇÒÒͬѧËù×÷³öµÄͼÏó£®µ±F½Ï´óʱ£¬M£¾£¾mÕâ¸öÌõ¼þ½«²»Âú×㣬ͼÏߢڽ«·¢ÉúÍäÇú£®
¹Ê´ð°¸Îª£º£¨1£©£¾£¾²»ÐèÒª £¨2£©ÒÒ ¢Ú
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÖªµÀʵÑéµÄÔÀíÒÔ¼°²Ù×÷ÖеÄ×¢ÒâÊÂÏ¶ÔÓÚͼÏßÎÊÌ⣬³£¼ûµÄ½âÌâ˼·ÊǵóöÎïÀíÁ¿Ö®¼äµÄ¹Øϵʽ£¬½áºÏ¹Øϵʽ£¬Í¨¹ýͼÏßµÄбÂÊ»ò½Ø¾à·ÖÎöÅжϣ®
A£® | ¸ÃÖʵãµÄλÒÆÓëʱ¼äÂú×ãx=4sin$\frac{4}{¦Ð}$t£¨cm£© | |
B£® | ÔÚt=1sʱ£¬ÖʵãµÄλÒÆΪ2$\sqrt{2}$cm | |
C£® | ÔÚt=1sºÍt=5sʱ£¬ÖʵãÊܵ½µÄ»Ø¸´Á¦Ïàͬ | |
D£® | ÔÚt=2017sʱ£¬ÖʵãµÄËÙ¶ÈΪ×î´ó | |
E£® | ÔÚ2¡«4sÄÚ£¬ÖʵãµÄµ¯ÐÔÊÆÄÜÔÚ²»¶Ï¼õС |
A£® | Ïß¿òÊܵ½µÄˮƽÍâÁ¦Ò»¶¨ÊǺ㶨µÄ | |
B£® | Ïß¿ò±ß³¤Óë´Å³¡¿í¶ÈµÄ±ÈֵΪ3£º8 | |
C£® | ³ö´Å³¡µÄʱ¼äÊǽøÈë´Å³¡Ê±µÄÒ»°ë | |
D£® | ³ö´Å³¡µÄ¹ý³ÌÖÐÍâÁ¦×öµÄ¹¦Óë½øÈë´Å³¡µÄ¹ý³ÌÖÐÍâÁ¦×öµÄ¹¦ÏàµÈ |
A£® | ²¼ÀÊÔ˶¯ÊÇÓÉÓÚÒºÌå·Ö×ӶԹ̶¨Ð¡¿ÅÁ£µÄײ»÷ÒýÆðµÄ£¬¹Ì¶¨Ð¡¿ÅÁ£µÄÌå»ýÔ½´ó£¬ÒºÌå·Ö×Ó¶ÔËüµÄײ»÷Ô½¶à£¬²¼ÀÊÔ˶¯¾ÍÔ½ÏÔÖø | |
B£® | ζÈÉý¸ß£¬µ¥Î»Ê±¼äÀï´ÓÒºÌå±íÃæ·É³öµÄ·Ö×ÓÊýÔ½¶à£¬ÒºÌå¼ÌÐøÕô·¢£¬±¥ºÍÆøѹǿÔö´ó | |
C£® | Ò»¶¨Á¿µÄÀíÏëÆøÌåÔÚij¹ý³ÌÖдÓÍâ½çÎüÈÈ2.5¡Á104J²¢¶ÔÍâ½ç×ö¹¦1.0¡Á104J£¬ÔòÆøÌåµÄζÈÉý¸ß£¬ÃܶȼõС | |
D£® | ¾§ÌåÔÚÈÛ»¯¹ý³ÌÖÐËùÎüÊÕµÄÈÈÁ¿£¬¼ÈÔö¼Ó·Ö×ӵĶ¯ÄÜ£¬Ò²Ôö¼Ó·Ö×ÓµÄÊÆÄÜ | |
E£® | ·Ö×ÓÁ¦±íÏÖΪ³âÁ¦Ê±£¬·Ö×ÓÁ¦ºÍ·Ö×ÓÊÆÄÜ×ÜÊÇËæ·Ö×Ó¼ä¾àÀëµÄÔö´ó¶ø¼õС |
A£® | Æû³µÊܵ½ÖØÁ¦¡¢Ö§³ÖÁ¦ºÍÏòÐÄÁ¦ | |
B£® | Æû³µÔÚÊúÖ±·½ÏòÉÏÖ»ÊÜÖØÁ¦ºÍÇÅÃæ¶ÔËüµÄÖ§³ÖÁ¦ | |
C£® | Æû³µ¶ÔÇÅÃæµÄѹÁ¦Ð¡ÓÚÆû³µµÄÖØÁ¦ | |
D£® | Æû³µ¶ÔÇÅÃæ·ÅÈëѹÁ¦´óÓÚÆû³µµÄÖØÁ¦ |