µç¶¯×ÔÐгµÇá±ã¡¢°²È«¡¢ÎÞÎÛȾ£¬ºÜÊÜÈËÃÇϲ°®£®Ä³Í¬Ñ§ÔÚË«ÐÝÈÕÆïµç¶¯×ÔÐгµµ½º£±õ¡¢Á¬µº¹Û¹â£¬Í¾¾È«³¤7000m¡¢±»ÈËÃdzÆ֮Ϊ¡°ÉñÖݵÚÒ»µÌ¡±µÄÁ¬ÔƸÛÀ¹º£´óµÌ£®Èôµç¶¯×ÔÐгµÒÔ18km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µç¶¯×ÔÐгµÇ£ÒýÁ¦µÄ¹¦ÂÊΪ150W£®Çó£º
£¨1£©¸Ãͬѧͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼ä£»
£¨2£©µç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦£»
£¨3£©µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦£®
¡¾´ð°¸¡¿
·ÖÎö£ºÊ×ÏÈÓÃt=
À´¼ÆËãͬѧͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼ä£»È»ºóÀûÓõÚÒ»ÎÊËùÇóʱ¼äÓù«Ê½W=Pt¼ÆËãµç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦£»µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦¿ÉÓÃF=
À´¼ÆË㣮
½â´ð£º½â£º£¨1£©18km/h=5m/s
ͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼ä£ºt=
=
=1400s£»
£¨2£©µç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦£ºW=Pt=150W×1400s=2.1×10
5J£»
£¨3£©µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦£ºF=
=
=30N£»
´ð£º£¨1£©¸Ãͬѧͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼äΪ1400s£»
£¨2£©µç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦Îª2.1×10
5J£»
£¨3£©µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦Îª30N£®
µãÆÀ£º¼ÆËãÌâÒ»°ãÓкü¸ÎÊ£¬Ç°Ò»ÎÊÊÇΪÏÂÒ»ÎÊ·þÎñµÄ£¬Òò´ËÒª»·»·Ïà¿Û£¬ÈÏÕæÍê³ÉÿһÎÊ£®
¿ÆÄ¿£º³õÖÐÎïÀí
À´Ô´£º2012-2013ѧÄê½ËÕÊ¡ËÕÖÝÊÐÐǸÛѧУ¾ÅÄ꼶£¨ÉÏ£©ÆÚÖÐÎïÀíÊÔ¾í£¨½âÎö°æ£©
ÌâÐÍ£º½â´ðÌâ
µç¶¯×ÔÐгµÇá±ã¡¢°²È«¡¢ÎÞÎÛȾ£¬ºÜÊÜÈËÃÇϲ°®£®Ä³Í¬Ñ§ÔÚË«ÐÝÈÕÆïµç¶¯×ÔÐгµµ½º£±õ¡¢Á¬µº¹Û¹â£¬Í¾¾È«³¤7000m¡¢±»ÈËÃdzÆ֮Ϊ¡°ÉñÖݵÚÒ»µÌ¡±µÄÁ¬ÔƸÛÀ¹º£´óµÌ£®Èôµç¶¯×ÔÐгµÒÔ18km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µç¶¯×ÔÐгµÇ£ÒýÁ¦µÄ¹¦ÂÊΪ150W£®Çó£º
£¨1£©¸Ãͬѧͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼ä£»
£¨2£©µç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦£»
£¨3£©µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦£®
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí
À´Ô´£º2012-2013ѧÄê½ËÕÊ¡ÑïÖÝÊÐÒÇÕ÷ÊоÅÄ꼶£¨ÉÏ£©µÚÒ»´ÎÔ¿¼ÎïÀíÊÔ¾í£¨½âÎö°æ£©
ÌâÐÍ£º½â´ðÌâ
µç¶¯×ÔÐгµÇá±ã¡¢°²È«¡¢ÎÞÎÛȾ£¬ºÜÊÜÈËÃÇϲ°®£®Ä³Í¬Ñ§ÔÚË«ÐÝÈÕÆïµç¶¯×ÔÐгµµ½º£±õ¡¢Á¬µº¹Û¹â£¬Í¾¾È«³¤7000m¡¢±»ÈËÃdzÆ֮Ϊ¡°ÉñÖݵÚÒ»µÌ¡±µÄÁ¬ÔƸÛÀ¹º£´óµÌ£®Èôµç¶¯×ÔÐгµÒÔ18km/hµÄËÙ¶ÈÔÈËÙÐÐÊ»£¬µç¶¯×ÔÐгµÇ£ÒýÁ¦µÄ¹¦ÂÊΪ150W£®Çó£º
£¨1£©¸Ãͬѧͨ¹ý´óµÌÈ«³ÌËùÐèµÄʱ¼ä£»
£¨2£©µç¶¯×ÔÐгµÍ¨¹ý´óµÌÈ«³ÌÇ£ÒýÁ¦Ëù×öµÄ¹¦£»
£¨3£©µç¶¯×ÔÐгµµÄÇ£ÒýÁ¦£®
²é¿´´ð°¸ºÍ½âÎö>>