ÌâÄ¿ÄÚÈÝ
ÈçͼËùʾ£¬ÊúÖ±·ÅÖõİëÔ²ÐξøÔµ¹ìµÀ°ë¾¶ÎªR£¬Ï¶ËÓë¹â»¬¾øԵˮƽÃæƽ»¬Á¬½Ó£¬Õû¸ö×°Öô¦ÓÚ·½ÏòÊúÖ±ÏòÉϵÄÔÈÇ¿µç³¡ÖÐEÖУ¬Ò»ÖÊÁ¿Îªm´øµçÁ¿+qµÄÎï¿é£¨¿ÉÊÓΪÖʵ㣩£¬´ÓˮƽÃæÉϵÄAÕ¼ÒÔ³õËÙ¶Èv0ˮƽÏò×óÔ˶¯ÑØ°ëÔ²ÐιìµÀÇ¡ºÃͨ¹ý×î¸ßµãC£¬³¡Ç¿´óСΪE£¨E£¼mg/q£©
£¨1£©ÇóСÇòÔÚCµãµÄËٶȣ®
£¨2£©ÊÔ¼ÆËãÎï¿éÔÚÔ˶¯¹ýÖп˷þĦ²ÁÁ¦×öµÄ¹¦£®
£¨3£©ÇóÎï¿é´ÓCµã·É³öºó£¬Âä»Ø¹ìµÀµÄλÖÃÓëBµÄˮƽ¾àÀ룮
£¨1£©ÇóСÇòÔÚCµãµÄËٶȣ®
£¨2£©ÊÔ¼ÆËãÎï¿éÔÚÔ˶¯¹ýÖп˷þĦ²ÁÁ¦×öµÄ¹¦£®
£¨3£©ÇóÎï¿é´ÓCµã·É³öºó£¬Âä»Ø¹ìµÀµÄλÖÃÓëBµÄˮƽ¾àÀ룮
·ÖÎö£º£¨1£©Îï¿éÇ¡ÄÜͨ¹ýÔ²»¡×î¸ßµãC£¬ÓÉÖغ͵糡Á¦µÄºÏÁ¦ÌṩÏòÐÄÁ¦£¬¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨ÂÉÇó³öÎï¿éͨ¹ý×î¸ßµãCʱµÄËٶȣ»
£¨2£©Îï¿éÔÚÔ˶¯¹ý³ÌÖУ¬ÖØÁ¦×ö¸º¹¦£¬µç³¡Á¦×öÕý¹¦£¬Ä¦²ÁÁ¦×ö¸º¹¦£¬¸ù¾Ý¶¯Äܶ¨ÀíÇó½â¿Ë·þĦ²ÁÁ¦×öµÄ¹¦£»
£¨3£©Îï¿éÀ뿪°ëÔ²ÐιìµÀºó×öÀàƽÅ×Ô˶¯£¬Ë®Æ½·½Ïò×öÔÈËÙÖ±ÏßÔ˶¯£¬ÊúÖ±·½Ïò×ö×ÔÓÉÂäÌåÔ˶¯£¬ÓÉÔ˶¯Ñ§¹«Ê½¼´¿ÉÇó½â
£¨2£©Îï¿éÔÚÔ˶¯¹ý³ÌÖУ¬ÖØÁ¦×ö¸º¹¦£¬µç³¡Á¦×öÕý¹¦£¬Ä¦²ÁÁ¦×ö¸º¹¦£¬¸ù¾Ý¶¯Äܶ¨ÀíÇó½â¿Ë·þĦ²ÁÁ¦×öµÄ¹¦£»
£¨3£©Îï¿éÀ뿪°ëÔ²ÐιìµÀºó×öÀàƽÅ×Ô˶¯£¬Ë®Æ½·½Ïò×öÔÈËÙÖ±ÏßÔ˶¯£¬ÊúÖ±·½Ïò×ö×ÔÓÉÂäÌåÔ˶¯£¬ÓÉÔ˶¯Ñ§¹«Ê½¼´¿ÉÇó½â
½â´ð£º½â£º
£¨1£©Îï¿éÇ¡ÄÜͨ¹ý×î¸ßµãCʱ£¬Ô²»¡¹ìµÀÓëÎï¿éÖ®¼äÈõÁ¦×÷Óã¬Îï¿éÊܵ½ÖØÁ¦ºÍµç³¡Á¦ÌṩÏòÐÄÁ¦£®
Mg-qE=m
½âµÃ£ºv=
£¨2£©Îï¿éÔÚÓÉÔ˶¯µ½CµÄ¹ý³ÌÖУ¬ÉèÎï¿é¿Ë·þĦ²ÁÁ¦×öµÄ¹¦W£¬
¸ù¾Ý¶¯Äܶ¨ÀíÓÐqE?2R-W-mg2R=
mvc2-
mv02
½âµÃ£ºW=
mvC2+
£¨qE-mg£©R
£¨3£©Îï¿éÀ뿪°ëÔ²ÐιìµÀºó×öÀàƽÅ×Ô˶¯£¬ÉèˮƽλÒÆΪSÔ˶¯Ê±¼äΪt£¬Ôòˮƽ·½ÏòÓУº
S=vCt
ÊúÖ±·½ÏòÓУº2R=
£¨g-
£©t2
½âµÃ£ºS=2R
´ð£º£¨1£©ÇóСÇòÔÚCµãµÄËÙ¶Èv=
£®
£¨2£©ÊÔ¼ÆËãÎï¿éÔÚÔ˶¯¹ýÖп˷þĦ²ÁÁ¦×öµÄ¹¦½âµÃ£ºW=
mvC2+
£¨qE-mg£©R£®
£¨3£©ÇóÎï¿é´ÓCµã·É³öºó£¬Âä»Ø¹ìµÀµÄλÖÃÓëBµÄˮƽ¾àÀë½âµÃ£ºS=2R£®
£¨1£©Îï¿éÇ¡ÄÜͨ¹ý×î¸ßµãCʱ£¬Ô²»¡¹ìµÀÓëÎï¿éÖ®¼äÈõÁ¦×÷Óã¬Îï¿éÊܵ½ÖØÁ¦ºÍµç³¡Á¦ÌṩÏòÐÄÁ¦£®
Mg-qE=m
v2 |
R |
½âµÃ£ºv=
(g-
|
£¨2£©Îï¿éÔÚÓÉÔ˶¯µ½CµÄ¹ý³ÌÖУ¬ÉèÎï¿é¿Ë·þĦ²ÁÁ¦×öµÄ¹¦W£¬
¸ù¾Ý¶¯Äܶ¨ÀíÓÐqE?2R-W-mg2R=
1 |
2 |
1 |
2 |
½âµÃ£ºW=
1 |
2 |
5 |
2 |
£¨3£©Îï¿éÀ뿪°ëÔ²ÐιìµÀºó×öÀàƽÅ×Ô˶¯£¬ÉèˮƽλÒÆΪSÔ˶¯Ê±¼äΪt£¬Ôòˮƽ·½ÏòÓУº
S=vCt
ÊúÖ±·½ÏòÓУº2R=
1 |
2 |
qE |
m |
½âµÃ£ºS=2R
´ð£º£¨1£©ÇóСÇòÔÚCµãµÄËÙ¶Èv=
(g-
|
£¨2£©ÊÔ¼ÆËãÎï¿éÔÚÔ˶¯¹ýÖп˷þĦ²ÁÁ¦×öµÄ¹¦½âµÃ£ºW=
1 |
2 |
5 |
2 |
£¨3£©ÇóÎï¿é´ÓCµã·É³öºó£¬Âä»Ø¹ìµÀµÄλÖÃÓëBµÄˮƽ¾àÀë½âµÃ£ºS=2R£®
µãÆÀ£º±¾ÌâÊÇÏòÐÄÁ¦Ó붯Äܶ¨Àí¡¢Æ½Å×Ô˶¯µÈµÈ֪ʶµÄ×ۺϣ¬¹Ø¼üҪץסÎï¿éÇ¡ÄÜͨ¹ý×î¸ßµãCµÄÁÙ½çÌõ¼þ£¬Çó³öÁÙ½çËٶȣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿