ÌâÄ¿ÄÚÈÝ
£¨1£©Ñ§Ï°Ð¡×éµÄͬѧÃǾ¹ý˼¿¼ºÍÀíÂÛÍƵ¼£¬¸÷×ÔÌá³öÁË×Ô¼ºµÄ¿´·¨£¬ÆäÖм×ͬѧÈÏΪµ¯»ÉµÄ¾¢¶ÈϵÊý¿ÉÄÜÓ뵯»É³¤¶È³ÉÕý±È£¬ÒÒͬѧÈÏΪµ¯»ÉµÄ¾¢¶ÈϵÊý¿ÉÄÜÓ뵯»ÉÔ³¤³É·´±È£¬¼×¡¢ÒÒÓÐÒ»ÃûͬѧµÄ¿´·¨ÊÇÕýÈ·µÄ£®ÄãÈÏΪÕýÈ·µÄÊÇ
A£®·ÖÎöÓëÂÛÖ¤¡¡¡¡¡¡¡¡¡¡B£®½øÐÐʵÑéÓëÊÕ¼¯Ö¤¾Ý
C£®²ÂÏëÓë¼ÙÉè D£®Öƶ¨¼Æ»®ÓëÉè¼ÆʵÑé
£¨2£©Ì½¾¿Ñ§Ï°Ð¡×é½øÐÐʵÑé¼Ç¼µÄÊý¾ÝÈçϱíËùʾ£®
ʵÑéÊý¾Ý¼Ç¼£¨g=10m/s2£©
Ô³¤ | ¹³ÂëÖÊÁ¿ | µ¯»É³¤¶È | µ¯»ÉÉì ³¤Á¿x |
µ¯»É¾¢¶È ϵÊýk | |
µ¯»ÉA | 10.00cm | 0.3kg | 13.00cm | 3.00cm | 100N/m |
µ¯»ÉB | 15.00cm | 0.1kg | 16.49cm | 1.49cm | 67.1N/m |
µ¯»ÉC | 20.00cm | 0.2kg | 24.00cm | ||
µ¯»ÉD | 30.00cm | 0.1kg | 32.99cm | 2.99cm | 33.4N/m |
£¨2£©µ¯»ÉµÄÉ쳤Á¿x=µ¯»É³¤¶È-Ô³¤£¬¾¢¶ÈϵÊýk¿ÉÓÉ£ºF=kxÇó³ö£®
Á½¸öͬѧÏÈ×ö³ö¼ÙÉ裬ºó½øÐÐʵÑéÑéÖ¤£¬ÊÇ¿Æѧ̽¾¿ÖеIJÂÏëÓë¼ÙÉè»·½Ú£®¹ÊÑ¡C
£¨2£©µ¯»ÉµÄÉ쳤Á¿x=µ¯»É³¤¶È-Ô³¤£º¼´£ºx=24.00-20.00=4.00cm=0.04m
ÀÁ¦F=mg=0.2¡Á10=2N
ÓÉ£ºF=kxµÃ£º
k=
F |
x |
¿´Ò»¿´ÆäËüÈý¸öµ¯»Éµ¯Á¦Óë¾¢¶ÈϵÊýÒÔ¼°ÐαäÁ¿µÄ¹Øϵ£º
µ¯»ÉA£º3=100¡Á0.03
µ¯»ÉB£º1¡Ö67.1¡Á0.0149
µ¯»ÉD£º1¡Ö33.4¡Á0.0299
¹Ê½áÂÛΪ£ºÔÚµ¯ÐÔÏÞ¶ÈÄÚ£¬µ¯»ÉµÄµ¯Á¦ÓëÐαäÁ¿³ÉÕý±È
¹Ê´ð°¸Îª£º£¨1£©ÒÒ£¬C
£¨2£©4.00cm£»50N/m£»ÔÚʵÑéÔÊÐíµÄÎó²î·¶Î§ÄÚ£¬µ¯»ÉµÄ¾¢¶ÈϵÊýÓ뵯»ÉÔ³¤³É·´±È
ͨ¹ý¡°Ì½¾¿µ¯»Éµ¯Á¦Ó뵯»ÉÉ쳤Á¿Ö®¼äµÄ¹Øϵ¡±ÊµÑ飬ÎÒÃÇÖªµÀ£ºÔÚµ¯ÐÔÏÞ¶ÈÄÚ£¬µ¯»Éµ¯Á¦FÓëÐαäÁ¿x³ÉÕý±È£¬²¢ÇÒ²»Í¬µ¯»É£¬Æä¾¢¶ÈϵÊýÒ²²»Í¬£®Ä³ÖÐѧµÄ̽¾¿Ñ§Ï°Ð¡×é´Ó×ÊÁÏÖв鵽£ºµ¯»ÉµÄ¾¢¶ÈϵÊýÓ뵯»ÉµÄ²ÄÁϺÍÐÎ×´Óйأ®¸ÃѧϰС×éÏëÑо¿µ¯»ÉµÄ¾¢¶ÈϵÊýÓ뵯»ÉÔ³¤µÄ¹Øϵ£¬ÏÖÓÐA£¬B£¬C£¬DËĸù²ÄÁϺʹÖϸÍêÈ«Ïàͬ½ö³¤¶È²»Í¬µÄµ¯»É£®
(1)ѧϰС×éµÄͬѧÃǾ¹ý˼¿¼ºÍÀíÂÛÍƵ¼£¬¸÷×ÔÌá³öÁË×Ô¼ºµÄ¿´·¨£¬ÆäÖм×ͬѧÈÏΪµ¯»ÉµÄ¾¢¶ÈϵÊý¿ÉÄÜÓ뵯»É³¤¶È³ÉÕý±È£¬ÒÒͬѧÈÏΪµ¯»ÉµÄ¾¢¶ÈϵÊý¿ÉÄÜÓ뵯»ÉÔ³¤³É·´±È£¬¼×¡¢ÒÒÓÐÒ»ÃûͬѧµÄ¿´·¨ÊÇÕýÈ·µÄ£®ÄãÈÏΪÕýÈ·µÄÊÇ________(Ìî¡°¼×¡±»ò¡°ÒÒ¡±)£¬¾ÍÕâÒ»»·½Ú¶øÑÔ£¬ÊôÓÚ¿Æѧ̽¾¿ÖеÄÄĸö»·½Ú________(ÌîÐòºÅ)£®
A£®·ÖÎöÓëÂÛÖ¤¡¡¡¡¡¡¡¡¡¡ B£®½øÐÐʵÑéÓëÊÕ¼¯Ö¤¾Ý
C£®²ÂÏëÓë¼ÙÉè D£®Öƶ¨¼Æ»®ÓëÉè¼ÆʵÑé
(2)ΪÑéÖ¤¼×¡¢ÒÒ˵Ŀ´·¨ÕýÈ·£¬¿Éͨ¹ýʵÑéÍê³É£¬ÊµÑéÆ÷²Ä³ýÉÏÊöµ¯»ÉºÍÒÑÖªÖÊÁ¿µÄ¼¸¸ö¹³ÂëÍ⣬»¹ÐèÒªµÄʵÑéÆ÷²ÄÊÇ________£®
(3)̽¾¿Ñ§Ï°Ð¡×é½øÐÐʵÑé¼Ç¼µÄÊý¾ÝÈçϱíËùʾ£®
ʵÑéÊý¾Ý¼Ç¼(g£½10 m/s2)
| Ô³¤ | ¹³ÂëÖÊÁ¿ | µ¯»É³¤¶È | µ¯»ÉÉì ³¤Á¿x | µ¯»É¾¢¶È ϵÊýk |
µ¯»ÉA | 10.00 cm | 0.3 kg | 13.00 cm | 3.00 cm | 100 N/m |
µ¯»ÉB | 15.00 cm | 0.1 kg | 16.49 cm | 1.49 cm | 67.1 N/m |
µ¯»ÉC | 20.00 cm | 0.2 kg | 24.00 cm | ||
µ¯»ÉD | 30.00 cm | 0.1 kg | 32.99 cm | 2.99 cm | 33.4 N/m |
ÇëÍê³ÉÉÏ±í£¬´ÓÖеóöµÄ½áÂÛΪ£º________.