江南APPе°ұеҗ‘дёӢдәҶпјҢзү©дҪ“дёҚдјҡе№іиЎЎгҖӮеҠЁж‘©ж“Ұеӣж•°еӨ§дәҺtanaж—¶пјҢеҰӮжһңзү©дҪ“ејҖе§ӢжҳҜйқҷжӯўзҡ„пјҢйӮЈд№Ҳдјҡз»ҙжҢҒйқҷжӯўзҠ¶жҖҒпјҢжӯӨж—¶жҳҜйқҷж‘©ж“ҰеҠӣиө·дҪңз”ЁпјҢйқҷж‘©ж“ҰеҠӣеӨ§е°ҸзӯүдәҺmgsinaпјҢиҖҢдёҚзӯүдәҺОј*mgcos江南APP:mgsin和mgcos分别是什么力(mgsinОёе’Ңumgcosзҡ„еҢәеҲ«)йҮҚеҠӣжІҝж–ңйқўеҗ‘дёӢеҲҶеҠӣдёәпјҡmgsinОёз”ұдәҺзү©дҪ“еҢҖйҖҹ,жүҖд»Ҙж‘©ж“ҰеҠӣе’Ңд»ҘдёҠйҮҚеҠӣзҡ„еҲҶеҠӣзӣёзӯүпјҡf=mgsinОёйҮҚеҠӣеһӮзӣҙж–ңйқўзҡ„еҲҶеҠӣдёәпјҡmgcosОё,иҝҷдёӘеҠӣе’ҢеҺӢеҠӣNзӣёзӯү,ж№жҚ®ж‘©ж“ҰеҠӣе…¬ејҸf=ОјN

1、жӮЁеҘҪпјҢйҪҗиҖҒеёҲдёәжӮЁи§Јзӯ”пјҡзү©дҪ“жІҝж–ңйқўеҢҖйҖҹдёӢж»‘пјҢеҸ—еҠӣеҰӮеӣҫдёҖпјҢж‘©ж“ҰеҠӣзӯүдәҺйҮҚеҠӣжІҝж–ңйқўеҗ‘дёӢеҲҶеҠӣпјҢеҚіОјmgcosОё=mgsinОёпјҢеҚі

2、иҝҷдёӘи§’еәҰзӯүдәҺж°ҙе№ійқўе’Ңж–ңйқўд№Ӣй—ҙеӨ№и§’зҡ„еәҰж•°пјҢеҸҜд»Ҙз”Ёж•°еӯҰзҡ„ж–№жі•иҜҒжҳҺзҡ„йҮҚеҠӣзҡ„еҲҶеҠӣиҰҒж№жҚ®е®һйҷ…жғ…еҶөеҲҶи§ЈпјҢйҮҚеҠӣеңЁеһӮзӣҙж–ңйқўж–№еҗ‘зҡ„еҲҶеҠӣпјҲеҜ№ж–ңйқўзҡ„еҺӢеҠӣпјүдёәmgcosОёдҪҝзү©дҪ“жІҝ

3、дёҖиҲ¬жқҘиҜҙ,mgsinОёжҳҜж–ңйқўдёҠйҮҚеҠӣдёҺж”ҜжҢҒеҠӣзҡ„еҗҲеҠӣгҖӮmgcosОёжҳҜж”ҜжҢҒеҠӣпјҢmgucosОёдёәзЈЁж“ҰеҠӣгҖӮ(uиЎЁзӨәзЈЁж“Ұзі»ж•°)ж–ңйқўдёҠзҡ„зү©дҪ“жүҖеҸ—еҗҲеҠӣдёәF=mgпјҲsinОё-ucosОё)

4、дёӢж»‘ж—¶:В°-ОјВ°=maеҚі:0.6g-0.8Ојg=aжүҖд»ҘпјҢзү©дҪ“еҜ№ж–ңйқўзҡ„еҺӢеҠӣдёҚжҳҜеһӮзӣҙдәҺж–ңйқўйҡҫйҒ“иҝҳжҳҜз«–зӣҙеҗ‘дёӢзҡ„?жҲ‘и®°еҫ—й«ҳдёҖиҜҫжң¬е°ұжҳҺзЎ®жңүи®ІиҝҮзұ»дјјй—®йўҳпјҢж‘©ж“ҰеҠӣfдёүдёӘ

5、дҪҚ移公ејҸx=1/2at2пјҢmgsinОёпјҚFfпјқmaж„ҸжҖқжҳҜпјҢжёёе®ўиҮӘиә«зҡ„йҮҚеҠӣmgжҳҜд»–еҫҖдёӢж»‘зҡ„еҠЁеҠӣпјҢжІҝзқҖж–ңйқўзҡ„еҲҶйҮҸжҳҜmgsinОёпјҢдҪҶжҳҜжңүж–ңйқўж‘©ж“ҰеҠӣFfпјҢдёӨиҖ…еҗҲеҠӣдә§з”ҹеҠйҖҹеәҰmaжҳҜжёёе®ўеүҚиҝӣ

6、еҗҲеҠӣжІҝж–ңйқўеҗ‘дёҠпјҢжүҖд»ҘеҠйҖҹеәҰеҗ‘дёҠпјҢеҮҸйҖҹгҖӮеҗҢзҗҶtanОё=Ојж—¶пјҢmgsinОё=ОјmgcosОёпјҢзү©дҪ“еҢҖйҖҹгҖӮйҖҡеёёжҲ‘们жҠҠйқҷж‘©ж“ҰеҠӣиҝ‘дјјдёәж»‘еҠЁж‘©ж“ҰеҠӣпјҢиҖҢдёҖиҲ¬ОјйғҪе°ҸдәҺ1пјҢжүҖд»ҘдёҖиҲ¬зҡ„ж–ңйқўОё

еҲҶи§ЈдёҚеңЁиҪҙдёҠзҡ„еҠӣ,дҪҝд№ӢиҗҪеңЁиҪҙдёҠд№ӢеҗҺ,жҲ‘们еҸҜд»ҘеҜ№xиҪҙе’ҢyиҪҙеҲҶеҲ«еҲ—ејҸ,XиҪҙ:FcosОұ+mgsinОё-f=mayиҪҙ:N=FsinОұ+mgcosОёд»ҘеҸҠиҫ…еҠ©ејҸf=ОјN,е’Ң第дёҖдёӘзҠ¶жҖҒдёӢеҫ—еҲ°зҡ„е…і江南APP:mgsin和mgcos分别是什么力(mgsinОёе’Ңumgcosзҡ„еҢәеҲ«)и§Јпј江南APPҡз”ұйўҳж„ҸеҸҜзҹҘеңЁж–ңйқўдёҠж—¶пјҢж»‘еҠЁж‘©ж“ҰеҠӣпјҡf=В°еҸҲf=ОјВ°пјҢОј=f/В°=В°/В°=tan30В°=вҲҡ3/3ж°ҙе№іж”ҫзҪ®ж—¶пјҢиӢҘејҖе§Ӣж»‘еҠЁпјҢеҲҷж»‘еҠЁж‘©ж“ҰеҠӣ