ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Èç½ñ£¬áéÖÝÊÐÇø¹«¹²×ÔÐгµ·þÎñµãËæ´¦¿É¼û£¬Õâ¸ø¹ã´óÊÐÃñµÄ³öÐдøÀ´Á˼«´óµÄ±ãÀû£¬Ò²ÊǵÍ̼³öÐС¢ÂÌÉ«³öÐÐÒ»Öֺܺõķ½Ê½£®
£¨1£©´Ó»·±£µÄ½Ç¶ÈÀ´¿´£¬áéÖݹ«¹²×ÔÐгµµÄ´óÁ¿Ê¹ÓÃÓÐÀûÓÚ¼õÉÙ³ÇÊеÄÎÛȾ£®
A.´óÆøÎÛȾ
B.Ë®ÎÛȾ
C.ÍÁÈÀÎÛȾ
D.°×É«ÎÛȾ
£¨2£©×ÔÐгµµÄÂÖÌ¥¡¢½Å̤°åÉÏÓа¼Í¹²»Æ½µÄ»¨ÎÆ£¬ÊÇΪÁË £®
£¨3£©Ð¡³õÆï×ÔÐгµÉϰ࣬È˺ͳµµÄ×ÜÖØÁ¦Îª700Å££¬ÐÐʻʱÿ¸öÂÖÌ¥ÓëµØÃæµÄ½Ó´¥Ãæ»ýÊÇ20ÀåÃ×2 £¬ ´Ëʱ¶ÔµØÃæµÄѹǿÊǶà´ó£¿
£¨4£©Ð¡³õÉÏ°àµÄijһ¶Î·ÉÏÒÔ3Ã×/ÃëµÄËÙ¶ÈÔÈËÙÐÐÊ»ÁË5·ÖÖÓ£¬´ËʱÊܵ½µÄ×èÁ¦Ô¼Îª×ÜÖØÁ¦µÄ0.025±¶£¬Õâ¶Îʱ¼äÄÚÇ£ÒýÁ¦×ö¹¦¶à´ó£¿
¡¾´ð°¸¡¿
£¨1£©A
£¨2£©Ôö´óĦ²Á
£¨3£©½â£ºÔÚˮƽÃæÉÏѹÁ¦ºÍÖØÁ¦ÏàµÈ£¬µØÃæÊܵ½µÄѹÁ¦Îª£ºF=G=700N£¬
¶øµç¶¯×ÔÐгµÓëµØÃæµÄ½Ó´¥Ãæ»ýΪ£ºS=2¡Á20cm2=0.004m2£¬
³µ¶ÔµØÃæµÄѹǿΪ£ºp= = =1.75¡Á105Pa£®
´ð£º´Ëʱ¶ÔµØÃæµÄѹǿÊÇ1.75¡Á105Pa£®
£¨4£©½â£º×èÁ¦f=0.025G=0.025¡Á700N=17.5N£¬
ÒòΪÔÈËÙÐÐÊ»£¬ËùÒÔÇ£ÒýÁ¦ÎªF=f=17.5N£¬
ÓÉv= ¿ÉµÃ£¬ÐÐʻ·³Ìs=vt=3m/s¡Á5¡Á60s=900m£¬
Ç£ÒýÁ¦×öµÄ¹¦Îª£ºW=Fs=17.5N¡Á900m=1.575¡Á104J£®
´ð£ºÕâ¶Îʱ¼äÄÚÇ£ÒýÁ¦×ö¹¦1.575¡Á104J£®
¡¾½âÎö¡¿½â£º£¨1£©Åŷŵ½¿ÕÆøÖеÄÓк¦ÆøÌåºÍÑ̳¾ÊÇ¿ÕÆøÎÛȾµÄÖ÷ÒªÎÛȾÎÊÐÃñ²»¿ªÆû³µ£¬¸ÄÆï×ÔÐгµÉϰ࣬ÊÇΪÁ˼õÉÙÓк¦ÆøÌåºÍÑ̳¾µÄÅÅ·Å£¬´Ó¶øÄܼõÉÙ´óÆøÎÛȾ£® ¹ÊÑ¡A£®£¨2£©×ÔÐгµµÄÂÖÌ¥ÉÏÓа¼Í¹²»Æ½µÄ»¨ÎÆ£¬ÊÇѹÁ¦Ò»¶¨Ê±£¬Ôö´ó½Ó´¥ÃæµÄ´Ö²Ú³Ì¶ÈÔö´óĦ²ÁÁ¦£®
¡¾¿¼µã¾«Îö¡¿¹ØÓÚ±¾Ì⿼²éµÄѹǿµÄ´óС¼°Æä¼ÆËãºÍ¹¦µÄ¼ÆË㣬ÐèÒªÁ˽âѹǿµÄ¼ÆË㹫ʽ¼°µ¥Î»£º¹«Ê½£ºp =F/s ,p±íʾѹǿ£¬F±íʾѹÁ¦£¬S±íʾÊÜÁ¦Ãæ»ýѹÁ¦µÄµ¥Î»ÊÇ N£¬Ãæ»ýµÄµ¥Î»ÊÇ m2, ѹǿµÄµ¥Î»ÊÇ N/m2,½Ð×öÅÁ˹¿¨£¬¼Ç×÷Pa £®1Pa=1N/m2£®(ÅÁ˹¿¨µ¥Î»ºÜС£¬Ò»Á£Æ½·ÅµÄÎ÷¹Ï×Ó¶ÔˮƽÃæµÄѹǿ´óԼΪ20Pa£©£»¹¦µÄ¼ÆË㹫ʽ£ºW = F S£»F ±íʾÁ¦£¬µ¥Î»£ºÅ£( N ) £® S ±íʾ¾àÀ룬µ¥Î»£ºÃ×£¨m£©W±íʾ¹¦£¬ ¹¦µÄµ¥Î»¾ÍÊÇÅ£¡¤ Ã× £® ½Ð×÷½¹¶ú£®¼´£º1 J = 1N¡¤m²ÅÄܵóöÕýÈ·´ð°¸£®
¡¾ÌâÄ¿¡¿Ëæ×ÅÖÇÄÜÊÖ»úµÄÆÕ¼°£¬µÍÍ·¿´ÊÖ»úµÄ¡°µÍÍ·×塱ԽÀ´Ô½¶à£¬ÄÇô£¬¾±×µ³ÐÊܵÄѹÁ¦¸úµÍÍ·µÄ½Ç¶ÈÓÐʲô¹Øϵ£¿¿ÆÑÐÈËÔ±½øÐÐÁËÑо¿£ºÖÆ×÷Í·²¿Ä£ÐÍ£¬Èçͼ¼×£¬Í·²¿¿ÉÈÆÖ§µãO£¨¾±×µ£©×ª¶¯£¬×ª¶¯½Ç¶Èͨ¹ý¹Ì¶¨ÔÚÉÏÃæµÄÁ¿½ÇÆ÷²âÁ¿£¬½«Ò»¸öСÇò¹ÒÔÚÄ£ÐÍÄÚ£¬ÆäÖØΪ5ţģÄâÍ·²¿µÄÖØÁ¦£¬Í·²¿ºóÃæ°óÒ»¸ùÉþ×ÓÄ£Ä⼡È⣬Éþ×ÓÉÏϵһ²âÁ¦¼Æ£¬Ö§µã£¨¾±×µ£©³ÐÊܵÄѹÁ¦Ô¼ÎªÍ·²¿ÖØÁ¦ÓëÉþ×ÓÀÁ¦Ö®ºÍ£¬ÊµÑéÊý¾ÝÈçÏÂ±í£º
µÍÍ·½Ç¶È/¶È | Éþ×ÓÀÁ¦/Å£ | ¾±×µ³ÐÊܵÄѹÁ¦/Å£ |
0 | 0 | 5 |
15 | 5 | 10 |
30 | 9 | 14 |
45 | 13.5 | 18.5 |
60 | 17.5 | 22.5 |
£¨1£©·ÖÎö±íÖÐÊý¾Ý£¬¿ÉµÃ³öµÄ½áÂÛÊÇ£»
£¨2£©¸ÄÍ·²¿Ä£ÐÍÏ൱ÓÚÈÆOµãת¶¯µÄ¸Ü¸Ë£¬ÈçͼÒÒ£¬µ±µÍÍ·½Ç¶ÈÔö´óʱ£¬Í·²¿ÖØÐÄÏò×óÒƶ¯£¬ÀÁ¦FµÄÁ¦±Û±äС£¬Çë·ÖÎöÀÁ¦F±ä´óµÄÔÒò£»
£¨3£©ÏÂÁдëÊ©ÖУ¬ÓÐÀûÓÚ±£»¤¾±×µµÄÊÇ
A.²»Òª³¤Ê±¼äµÍÍ·¿´ÊÖ»ú
B.Êʵ±Ì§¸ßÊÖ»úÆÁÄ»£¬¼õСµÍÍ·½Ç¶È
C.µÍÍ·¿´Êé¾ÃÁËÓ¦Êʵ±Ì§Í·£¬ÒÔ»º½â¾±×µ³ÐÊܵÄѹÁ¦£®
¡¾ÌâÄ¿¡¿Ð¡¸Û¿´µ½Ò½ÉúÔÚ¸ø²¡ÈËÊäҺʱ£¬ÊÖÖ¸ÇᵯÊäÒº¹Ü£¬ÓÐÆøÅÝÏòÉÏÔ˶¯£¬µ«Ëû·¢ÏÖÆøÅÝÔÚ²»Í¬Î»ÖÃÉÏÉýµÄ¿ìÂýÊDz»Í¬µÄ£¬ÆøÅÝÉÏÉýËÙ¶ÈÓëÄÄЩÒòËØÓйØÄØ£¿ÎªÁË̽¾¿ÆøÅÝÔ˶¯ËÙ¶ÈÓëÇãб½ÇÓйØϵ£¬Ð¡Ã÷ʹÓÃÈçͼËùʾµÄ×°ÖýøÐÐʵÑ飬²â³ö²£Á§¹ÜÔÚ²»Í¬Çãб½ÇÏÂÆøÅÝÔ˶¯µÄËٶȣ¬Çé¿öÈçÏÂ±í£º ÒºÌ壺×ÔÀ´Ë®£»ÒºÖù³¤¶È£º30cm£»ÆøÅݳ¤¶È£º1mm
ÓëÊúÖ±·½ÏòµÄ¼Ð½Ç¦È/¶È | 85 | 75 | 65 | 55 | 45 | 35 | 25 | 15 | 5 | 0 |
Ô˶¯Ê±¼ät/s | 32.3 | 20.0 | 15.3 | 12.5 | 11.6 | 11.8 | 12.5 | 14.5 | 19.5 | 25 |
ƽ¾ùËÙ¶Èv£¨cm/s£© | 0.93 | 1.50 | 1.96 | 2.40 | 2.59 | 2.54 | 2.40 | 2.07 | 1.54 |
¸ù¾ÝÉÏÊöÊý¾Ý£¬Çë»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©µ±¦È½ÇΪ0¶Èʱ£¬ÆøÅÝÔ˶¯µÄƽ¾ùËÙ¶ÈÊÇcm/s£®
£¨2£©Ëæ¦È½ÇµÄÔö´ó£¬ÆøÅÝÔ˶¯Ëٶȱ仯Çé¿öÊÇ £®
¡¾ÌâÄ¿¡¿ÔÚÒ»´Î¿ÎÍâ»î¶¯ÖУ¬Ð¡Ã÷ͬѧ¶Ô¼ÒÓõçÆ÷½øÐÐÁËÏà¹ØµÄ¹Û²ìºÍÑо¿£¬ËûÒÔÒ»¸öÁ½Óã¨ÇçÌìÓÃÌ«ÑôÄÜ¡¢ÒõÌìÓõç¼ÓÈÈ£©µçÈÈË®Æ÷Ϊ¹Û²ìÑо¿¶ÔÏ󣬼ǼÁËÓйØÊý¾Ý£®¹Ø±Õ¼ÒÀïµÄÆäËüÓõçÆ÷£¬Ö»½«µçÈÈË®Æ÷½ÓÈëµç·ÖÐÉÕË®£¬ÓõçÈÈË®Æ÷¼ÓÈÈÒ»Âúºø³õÎÂt0=30¡æµÄË®£¬¹Û²ìµçÄÜ±í£¬µçÄܱí±êÓС°220V 10A 50Hz 600r/KWh¡±×ÖÑù£¬±íÅÌÔÚ15minÄÚתÁË240r£¬´ËʱÓÃζȼƲâµÃµÄË®ÎÂΪ45¡æ£¬ÇëÄã¾ÍÕâλͬѧÔڻÖлñµÃµÄÓйØ×ÊÁÏ£¬Çó½âÓйØÎÊÌ⣺
µçÈÈË®Æ÷µÄÃúÅÆ | |
ÐͺŠ| ¡Á¡Á¡ÁÁ½ÓõçÈÈË®Æ÷ |
¶î¶¨µçѹ | 220V |
¶î¶¨¹¦ÂÊ | 1800W |
ÈÝ»ý | 20L |
¶î¶¨×î¸ßÎÂ¶È | 75¡æ |
£¨1£©¼ÓÈÈ15min£¬Ë®ËùÎüÊÕµÄÈÈÁ¿£»
£¨2£©µçÈÈË®Æ÷¹¤×÷15minÏûºÄµÄµçÄܺ͵繦ÂÊ£»
£¨3£©ÇçÌìÓÃÌ«ÑôÄܼÓÈÈ£¬Èç¹ûÿ·ÖÖÓÎüÊÕÌ«Ñô·øÉäµÄÄÜÁ¿Îª8.4¡Á104J£¬ÆäÖÐ30%±»Ë®ÎüÊÕ£¬°ÑÉÏÊöÖÊÁ¿¡¢³õÎÂÏàͬµÄË®¼ÓÈȵ½ÏàͬµÄЧ¹ûÐèÒª¶à³¤Ê±¼ä£¿£¨CË®=4.2¡Á103J/£¨kg¡æ£©