·ÖÎö £¨1£©¸ù¾ÝÓα꿨³ßµÄ¶ÁÊýÔÀíµÃ³ö°ÚÇòAµÄÖ±¾¶£®
£¨2£©¸ù¾Ý¼«¶Ìʱ¼äÄ򵀮½¾ùËٶȵÈÓÚ˲ʱµÄÇó³ö°ÚÇò¾¹ý×îµÍµãµÄËÙ¶È£¬¸ù¾ÝÖØÁ¦ÊÆÄܵļõСÁ¿µÈÓÚ¶¯ÄܵÄÔö¼ÓÁ¿Áгö»úеÄÜÊØºãµÄ±í´ïʽ£®
½â´ð ½â£º£¨1£©ÓαêÖУ¬39mmµÈ·Ö³É20·Ý£¬ÔòÿһС¸ñµÄ³¤¶ÈΪ1.95mm£¬
¸ù¾Ýd+1.95¡Á6=42mm£¬½âµÃd=30.30mm=3.030cm£®
£¨2£©°ÚÇòͨ¹ý×îµÍµãµÄ˲ʱËÙ¶Èv=$\frac{d}{t}$£¬Ôò¶¯ÄܵÄÔö¼ÓÁ¿Îª$\frac{1}{2}m\frac{{d}^{2}}{{t}^{2}}$£¬ÖØÁ¦ÊÆÄܵļõСÁ¿ÎªmgL£¨1-cos¦È£©£¬¸ù¾Ý$mgL£¨1-cos¦È£©=\frac{1}{2}m\frac{{d}^{2}}{{t}^{2}}$µÃ£¬$gL£¨1-cos¦È£©=\frac{1}{2}£¨\frac{d}{t}£©^{2}$£®
¹Ê´ð°¸Îª£º3.030£¬$gL£¨1-cos¦È£©=\frac{1}{2}£¨\frac{d}{t}£©^{2}$£®
µãÆÀ ½â¾ö±¾ÌâµÄ¹Ø¼üÕÆÎÕÓα꿨³ßµÄ¶ÁÊýÔÀí£¬ÒÔ¼°ÖªµÀ¼«¶Ìʱ¼äÄ򵀮½¾ùËٶȵÈÓÚ˲ʱËÙ¶È£¬»ù´¡Ì⣮
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | AB¼äµçÊÆ²îÒ»¶¨µÈÓÚBC¼äµçÊÆ²î | B£® | AB¼äµçÊÆ²îÒ»¶¨´óÓÚBC¼äµçÊÆ²î | ||
| C£® | AB¼äµçÊÆ²îÒ»¶¨Ð¡ÓÚBC¼äµçÊÆ²î | D£® | AB¼äµçÊÆ²î¿ÉÄܵÈÓÚBC¼äµçÊÆ²î |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | A×î¿ìÂ䵨 | B£® | B×î¿ìÂ䵨 | C£® | C×î¿ìÂ䵨 | D£® | ÎÞ·¨ÅÐ¶Ï |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | $\frac{mg}{q}$ | B£® | $\frac{\sqrt{3}mg}{3q}$ | C£® | $\frac{\sqrt{3}mg}{2q}$ | D£® | $\frac{\sqrt{3}mg}{q}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | $\sqrt{\frac{gR}{3}}$ | B£® | $\sqrt{\frac{2gR}{3}}$ | C£® | $\sqrt{gR}$ | D£® | $\sqrt{2gR}$ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | v1ºÍv2¶ÁÊýÏàµÈ | |
| B£® | v1ºÍv2Á½±íÖ¸ÕëÆ«×ª½ÇÏàµÈ | |
| C£® | v1ºÍv2Á½±íµÄ¶ÁÊýÓëÁ½¸öµçѹ±íµÄÄÚ×èÎÞ¹Ø | |
| D£® | v1ºÍv2Á½±íÖ¸ÕëÆ«×ª½ÇÖ®±ÈµÈÓÚÁ½¸öµçѹ±íµÄÄÚ×èÖ®±È |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ÍÁÐDZíÃæÖØÁ¦¼ÓËٶȱȵØÇòµÄ´ó | B£® | ÍÁÐDZíÃæÖØÁ¦¼ÓËٶȱȵØÇòµÄС | ||
| C£® | ÍÁÐǹ«×ªµÄÖÜÆÚ±ÈµØÇòµÄ³¤ | D£® | ÍÁÐǹ«×ªµÄÖÜÆÚ±ÈµØÇòµÄ¶Ì |
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - 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