·ÖÎö £¨1£©¸ù¾ÝʵÑéµÄÔÀíÒÔ¼°²Ù×÷ÖеÄ×¢ÒâÊÂÏîÈ·¶¨ºÏÀíµÄ²Ù×÷²½Ö裮
£¨2£©¸ù¾Ý¼«¶Ìʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚ˲ʱËÙ¶ÈÇó³öСÇòͨ¹ý¹âµçÃŵÄËٶȣ¬´Ó¶øµÃ³ö¶¯ÄܵÄÔö¼ÓÁ¿£¬¸ù¾ÝϽµµÄ¸ß¶ÈÇó³öÖØÁ¦ÊÆÄܵļõСÁ¿£¬´Ó¶øµÃ³ö»úеÄÜÊغãµÄ±í´ïʽ£®
½â´ð ½â£º£¨1£©A¡¢ÊµÑéÖÐͨ¹ý¼«¶Ìʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚ˲ʱËٶȵóöСÇòͨ¹ý¹âµçÃŵÄ˲ʱËٶȣ¬Ð¡ÇòÖ±¾¶È¡µÃԽС£¬²âÁ¿µÄÎó²îԽС£¬¹ÊAÕýÈ·£®
B¡¢ÎªÁ˼õСʵÑéµÄÎó²î£¬Á½¸ö¹âµçÃŵļä¾àÊʵ±´óһЩ£¬µ«ÊǹâµçÃÅ1²»Ò»¶¨ÐèÒª¿¿½üСÇòÊÍ·ÅÆ÷£¬¹ÊB´íÎó£¬CÕýÈ·£®
D¡¢ÊµÑéÖУ¬ÎªÁ˼õС×èÁ¦£¬Ð¡ÇòÑ¡ÔñÖÊÁ¿´óһЩ£¬Ìå»ýСһЩµÄ£¬¹ÊD´íÎó£®
¹ÊÑ¡£ºAC£®
£¨2£©Ð¡Çòͨ¹ýÁ½¸ö¹âµçÃŵÄ˲ʱËٶȷֱðΪ${v}_{1}=\frac{D}{{t}_{1}}$£¬${v}_{2}=\frac{D}{{t}_{2}}$£¬ÖØÁ¦ÊÆÄܵļõСÁ¿Îªmgx£¬¶¯ÄܵÄÔö¼ÓÁ¿Îª$\frac{1}{2}m{{v}_{2}}^{2}-\frac{1}{2}m{{v}_{1}}^{2}$=$\frac{1}{2}m£¨\frac{{D}^{2}}{{{t}_{2}}^{2}}-\frac{{D}^{2}}{{{t}_{1}}^{2}}£©$£®
ËùÒÔµ±mgx=$\frac{1}{2}m£¨\frac{{D}^{2}}{{{t}_{2}}^{2}}-\frac{{D}^{2}}{{{t}_{1}}^{2}}£©$ʱ£¬»úеÄÜÊغ㣮
¹Ê´ð°¸Îª£º£¨1£©AC£¬£¨2£©mgx=$\frac{1}{2}m£¨\frac{{D}^{2}}{{{t}_{2}}^{2}}-\frac{{D}^{2}}{{{t}_{1}}^{2}}£©$£®
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÖªµÀʵÑéµÄÔÀí£¬ÖªµÀ¼«¶Ìʱ¼äÄÚµÄƽ¾ùËٶȵÈÓÚ˲ʱËٶȣ¬DԽС£¬Æ½¾ùËٶȱíʾ˲ʱËÙ¶ÈÎó²îԽС£®
Ä꼶 | ¸ßÖÐ¿Î³Ì | Ä꼶 | ³õÖÐ¿Î³Ì |
¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍƼö£¡ |
¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍƼö£¡ |
¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍƼö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍƼö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | µ±mÒ»¶¨Ê±£¬¦ÈԽС£¬»¬¿é¶ÔµØÃæµÄѹÁ¦Ô½´ó | |
B£® | µ±mÒ»¶¨Ê±£¬¦ÈÔ½´ó£¬Çá¸ËÊÜÁ¦Ô½Ð¡ | |
C£® | µ±¦ÈÒ»¶¨Ê±£¬MÔ½´ó£¬»¬¿éÓëµØÃæ¼äµÄĦ²ÁÁ¦Ô½´ó | |
D£® | µ±¦ÈÒ»¶¨Ê±£¬MԽС£¬¿ÉÐü¹ÒÖØÎïCµÄÖÊÁ¿mÔ½´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | ÕâÁв¨µÄÖÜÆÚΪ0.3s£¬Õñ·ùΪ15cm | |
B£® | ÕâÁв¨µÄ²¨³¤Îª4m£¬²¨ËÙΪ20m/s | |
C£® | t=0.3sÄ©£¬x=4m´¦µÄÖʵãËÙ¶ÈÑØyÖáÕý·½Ïò | |
D£® | t=3sÄ©£¬x=40m´¦µÄÖʵãÑØxÖáÕý·½ÏòÇ°½øÁË50m |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
ʱ¼ä£¨s£© | ÏÂÂä¾àÀ루m£© |
0.0 | 0.000 |
0.4 | 0.036 |
0.8 | 0.469 |
1.2 | 0.957 |
1.6 | 1.447 |
2.0 | X |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | PÏòaµã»¬¶¯£¬µçѹ±íʾÊý±äС | B£® | PÏòaµã»¬¶¯£¬µçѹ±íʾÊý±ä´ó | ||
C£® | PÏòbµã»¬¶¯£¬µçѹ±íʾÊý±äС | D£® | PÏòbµã»¬¶¯£¬µçѹ±íʾÊý±ä´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑéÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
A£® | $\frac{3}{2}$x | B£® | $\frac{5}{2}$x | C£® | x | D£® | 2x |
²é¿´´ð°¸ºÍ½âÎö>>
°Ù¶ÈÖÂÐÅ - 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