ÌâÄ¿ÄÚÈÝ
ÈÕ³£Éú»îÖУ¬ÎªÁËÈÃͬѧÃÇÑø³É¹Ø×¢Éú»îºÍÉç»áµÄÁ¼ºÃÏ°¹ß£¬ÎïÀíÀÏʦ³«µ¼Í¬Ñ§ÃǶÔÉí±ßһЩ³£¼ûµÄÎïÀíÁ¿½øÐйÀ²âµÄʵ¼ù»î¶¯£¬ÒÔÏÂÊÇËûÃǽ»Á÷ʱµÄÒ»×é¹À²âÊý¾Ý£¬ÄãÈÏΪÊý¾ÝÖÐÃ÷ÏÔ²»·ûºÏʵ¼ÊµÄÊÇ£¨ £©A£®È˵ÄÕý³£ÌåÎÂΪ37¡æ
B£®½ÌÊÒÖÐÈÕ¹âµÆ¹ÜµÄ³¤¶ÈΪ2 m
C£®³ÉÄêÈËÕý³£²½ÐÐ5 minͨ¹ýµÄ·³ÌԼΪ400 m
D£®Ò»Î»ÖÐѧÉúÍêÈ«½þûÔÚË®ÖÐÊܵ½µÄ¸¡Á¦Îª500 N
¡¾´ð°¸¡¿·ÖÎö£ºÒªÕýÈ·½â¾ö´ËÌ⣬ÐèÒª¶ÔÉí±ßµÄÊÂÎï×¢Òâ¹Û²ì£¬ÕÆÎÕһЩ³£¼ûµÄζȡ¢³¤¶È¼°ËÙ¶ÈÊýÖµ£®
½â´ð£º½â£ºA¡¢È˵ÄÕý³£ÌåÎÂΪ37¡æ£¬ËùÒÔA˵·¨ÕýÈ·£¬²»·ûºÏÌâÒ⣮
B¡¢½ÌÊÒÖÐÈÕ¹âµÆ¹ÜµÄ³¤¶È´óԼΪ150cm»ò120cm£¬ËùÒÔB˵·¨´íÎ󣬷ûºÏÌâÒ⣮
C¡¢¸ù¾ÝCÖÐÊý¾Ý¿ÉÖª£¬³ÉÄêÈ˵IJ½ÐÐËÙ¶ÈΪv==¡Ö1.3m/s£¬½Ó½ü³ÉÄêÈ˵IJ½ÐÐËٶȣ¬Ëµ·¨ÕýÈ·£¬²»·ûºÏÌâÒ⣮
D¡¢ÖÐѧÉúµÄÖÊÁ¿´óԼΪ50kg£¬ËùÒÔÖÐѧÉúµÄÌå»ý´óԼΪ£ºV===0.05m3
È«²¿½þûʱÊܵ½µÄ¸¡Á¦ÊÇF¸¡=¦ÑË®gVÅÅ=1.0×103kg/m3×10N/kg×0.05m3=500N£¬ËùÒÔD½Ó½üÊÂʵ£¬²»·ûºÏÌâÒ⣮
¹ÊÑ¡B£®
µãÆÀ£º´ËÌâÖ÷Òª¿¼²éÁËÈÕ³£Éú»îÖеij£¼ûÏÖÏó£¬Ñ§ÉúÔÚƽʱӦ¶à¼Ó×¢ÒâºÍ»ýÀÛ£®
½â´ð£º½â£ºA¡¢È˵ÄÕý³£ÌåÎÂΪ37¡æ£¬ËùÒÔA˵·¨ÕýÈ·£¬²»·ûºÏÌâÒ⣮
B¡¢½ÌÊÒÖÐÈÕ¹âµÆ¹ÜµÄ³¤¶È´óԼΪ150cm»ò120cm£¬ËùÒÔB˵·¨´íÎ󣬷ûºÏÌâÒ⣮
C¡¢¸ù¾ÝCÖÐÊý¾Ý¿ÉÖª£¬³ÉÄêÈ˵IJ½ÐÐËÙ¶ÈΪv==¡Ö1.3m/s£¬½Ó½ü³ÉÄêÈ˵IJ½ÐÐËٶȣ¬Ëµ·¨ÕýÈ·£¬²»·ûºÏÌâÒ⣮
D¡¢ÖÐѧÉúµÄÖÊÁ¿´óԼΪ50kg£¬ËùÒÔÖÐѧÉúµÄÌå»ý´óԼΪ£ºV===0.05m3
È«²¿½þûʱÊܵ½µÄ¸¡Á¦ÊÇF¸¡=¦ÑË®gVÅÅ=1.0×103kg/m3×10N/kg×0.05m3=500N£¬ËùÒÔD½Ó½üÊÂʵ£¬²»·ûºÏÌâÒ⣮
¹ÊÑ¡B£®
µãÆÀ£º´ËÌâÖ÷Òª¿¼²éÁËÈÕ³£Éú»îÖеij£¼ûÏÖÏó£¬Ñ§ÉúÔÚƽʱӦ¶à¼Ó×¢ÒâºÍ»ýÀÛ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿