ÌâÄ¿ÄÚÈÝ
£¨1£©Ä³Í¬Ñ§ÓÃÓα꿨³ß²âÁ¿Ò»Ô²ÖùÌåµÄ³¤¶Èl£¬ÓÃÂÝÐý²â΢Æ÷²âÁ¿¸ÃÔ²ÖùÌåµÄÖ±¾¶d£¬Ê¾ÊýÈçͼ£®ÓÉͼ¿É¶Á³öl=______cm£¬d=______mm
£¨2£©ÔÚ¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¹æÂÉ¡±µÄʵÑéÖеõ½Ò»ÌõÖ½´ø£¬ÈçͼËùʾO¡¢A¡¢B¡¢C¡¢D¡¢E¡¢FÊÇÖ½´øÉϵÄÆ߸ö¼ÆÊýµã£¬Ã¿ÏàÁÚÁ½¸ö¼ÆÊý¼äÓÐËĸöµãûÓл³ö£¬ÓÃS1¡¢S2¡¢S3¡¢S4¡¢S5¡¢S6±íʾÏàÁÚÁ½¸ö¼ÆÊýµã¼äµÄ¾àÀ룬ÔÚÖ½´øµÄÏ·½ÓúÁÃ׿̶ȳ߲âÁ¿¼ÆÊýµã¼äµÄ¾àÀ룬ÒÑÖª´òµã¼ÆʱÆ÷µçԴƵÂÊΪ50Hz£¬ÄÇô£¬´òCµã¼Æʱ¶ÔÓ¦µÄËٶȴóСÊÇ______m/s£»¼ÆËãÖØÎï¼ÓËٶȵĴóСÊÇa=______m/s2£¨ÉÏÊö¼ÆËã½á¹û¾ù±£ÁôÈýλÓÐЧÊý×Ö£©
£¨2£©ÔÚ¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¹æÂÉ¡±µÄʵÑéÖеõ½Ò»ÌõÖ½´ø£¬ÈçͼËùʾO¡¢A¡¢B¡¢C¡¢D¡¢E¡¢FÊÇÖ½´øÉϵÄÆ߸ö¼ÆÊýµã£¬Ã¿ÏàÁÚÁ½¸ö¼ÆÊý¼äÓÐËĸöµãûÓл³ö£¬ÓÃS1¡¢S2¡¢S3¡¢S4¡¢S5¡¢S6±íʾÏàÁÚÁ½¸ö¼ÆÊýµã¼äµÄ¾àÀ룬ÔÚÖ½´øµÄÏ·½ÓúÁÃ׿̶ȳ߲âÁ¿¼ÆÊýµã¼äµÄ¾àÀ룬ÒÑÖª´òµã¼ÆʱÆ÷µçԴƵÂÊΪ50Hz£¬ÄÇô£¬´òCµã¼Æʱ¶ÔÓ¦µÄËٶȴóСÊÇ______m/s£»¼ÆËãÖØÎï¼ÓËٶȵĴóСÊÇa=______m/s2£¨ÉÏÊö¼ÆËã½á¹û¾ù±£ÁôÈýλÓÐЧÊý×Ö£©
£¨1£©Óα꿨³ßµÄÖ÷³ß¶ÁÊýΪ22mm£¬Óαê¶ÁÊýΪ0.1¡Á5=0.5mm£¬ËùÒÔ×îºó¶ÁÊýΪ£º22.5mm=2.25cm£®
ÂÝÐý²â΢Æ÷µÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ6.5mm£¬¿É¶¯¿Ì¶È¶ÁÊýΪ36.0¡Á0.01=0.360mm£¨0Ϊ¹À¶Á£©£¬ËùÒÔ×îºó¶ÁÊýΪ6.860mm£®
£¨2£©Ã¿ÏàÁÚÁ½¸ö¼ÆÊý¼äÓÐËĸöµãûÓл³ö£¬ÏàÁڵļÆÊýµãʱ¼ä¼ä¸ôΪ0.1s£¬
ÀûÓúÁÃ׿̶ȳ߲â³öB¡¢CÁ½µã¼ä¾àS3=7.0mm=0.70cm
ijʱ¿ÌµÄ˲ʱËٶȵÈÓÚÒ»¶Îʱ¼äÄÚµÄƽ¾ùËÙ¶È
vC=
=0.0800m/s£¬
ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2µÃ£º
a=
=
=0.200m/s2
¹Ê´ð°¸Îª£º£¨1£©2.25£¬6.860£®£¨2£©0.0800m£¬0.200
ÂÝÐý²â΢Æ÷µÄ¹Ì¶¨¿Ì¶È¶ÁÊýΪ6.5mm£¬¿É¶¯¿Ì¶È¶ÁÊýΪ36.0¡Á0.01=0.360mm£¨0Ϊ¹À¶Á£©£¬ËùÒÔ×îºó¶ÁÊýΪ6.860mm£®
£¨2£©Ã¿ÏàÁÚÁ½¸ö¼ÆÊý¼äÓÐËĸöµãûÓл³ö£¬ÏàÁڵļÆÊýµãʱ¼ä¼ä¸ôΪ0.1s£¬
ÀûÓúÁÃ׿̶ȳ߲â³öB¡¢CÁ½µã¼ä¾àS3=7.0mm=0.70cm
ijʱ¿ÌµÄ˲ʱËٶȵÈÓÚÒ»¶Îʱ¼äÄÚµÄƽ¾ùËÙ¶È
vC=
xBD |
tBD |
ÓÉÓÚÏàÁÚµÄʱ¼ä¼ä¸ôλÒÆÖ®²îÏàµÈ£¬¸ù¾ÝÔ˶¯Ñ§¹«Ê½ÍÆÂÛ¡÷x=at2µÃ£º
a=
s2-s1 |
T2 |
(0.80-0.30)cm-0.30cm |
(0.1s)2 |
¹Ê´ð°¸Îª£º£¨1£©2.25£¬6.860£®£¨2£©0.0800m£¬0.200
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿