ÌâÄ¿ÄÚÈÝ
ÔÚ̽¾¿ÎïÌå½öÔÚÖØÁ¦×÷ÓÃÏÂÊÇ·ñ×öÔȱäËÙÖ±ÏßÔ˶¯µÄʵÑéÖУ¬ÀûÓôò³öÀ´µÄÖ½´ø¿ÉÒÔ²â³öµ±µØµÄÖØÁ¦¼ÓËٶȡ£Ä³´ÎʵÑéµÃµ½µÄÖ½´øÈçͼËùʾ£¬O¡¢A¡¢B¡¢C¡¢DΪÏàÁÚµÄÎå¸öµã£¬²âµÃOA=5.6mm¡¢OB=15.0mm¡¢OC=28.3mm¡¢OD=45.5mm£¬´òÏÂÏàÁÚÁ½¸öµã¼äµÄʱ¼ä¼ä¸ôΪ0.02s¡£
¢Ù µ±µØµÄÖØÁ¦¼ÓËÙ¶Èg = ¡¡¡¡¡¡¡¡m/s2¡££¨½á¹û±£ÁôÈýλÓÐЧÊý×Ö£©
¢Ú °Ñ¢ÙÎÊÌâÖÐÇóµÃµÄÖØÁ¦¼ÓËÙ¶ÈÓëµ±µØÖØÁ¦¼ÓËٶȵıê×¼Öµ±È½Ï£¬·¢ÏÖÁ½Õß²¢²»ÏàµÈ£¬³ýÁ˶ÁÊýÎó²îÍ⣬ÄãÈÏΪ²úÉúÎó²îµÄÆäËüÔÒò¿ÉÄÜÊÇ ¡¡¡¡¡¡¡¡¡¡¡¡ £¨Ö»ÒªÇóд³öÒ»ÖÖÔÒò£©¡£
¢Ù 9.69m/s2 £¨4·Ö£©¢Ú Ö½´øÓëÏÞλ¿×Ö®¼äµÄ×èÁ¦¡¢¿ÕÆø×èÁ¦µÈ¡££¨2·Ö£©
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿