如圖所示，A、B兩物塊置於繞豎直軸勻速轉動的水平圓盤上，兩物塊始終相對圓盤靜止．已知兩物塊的質量mA<m...
問題詳情：如圖所示，A、B兩物塊置於繞豎直軸勻速轉動的水平圓盤上，兩物塊始終相對圓盤靜止．已知兩物塊的質量mA<mB，運動半徑rA>rB，則下列關係一定正確的是A．角速度ωA<ωBB．線速度vA<vBC．向心加速度aA>aBD．向心力FA>FB【回答】C...
如圖所示，固定的光滑平臺左端固定有一光滑的半圓軌道，軌道半徑為R，平臺上靜止放著兩個滑塊A、B，其質量mA=m...
問題詳情：如圖所示，固定的光滑平臺左端固定有一光滑的半圓軌道，軌道半徑為R，平臺上靜止放著兩個滑塊A、B，其質量mA=m，mB=2m，兩滑塊間夾有少量炸*．平臺右側有一小車，靜止在光滑的水平地面上，小車質量M=3m，車長L=2R，車面與平臺的臺...
用“mam”造句大全，mam造句
Fifteenyearsyoungerthanmam.Fromthebeginningoftheariathen,mam'selle.Theypersistentlycalllazywaitresseswithastrangeword'devushka'meaning'mam'.ThelastthingthatLaurawantedwasthatmamandMarcdoingthatup...
My18-month-oldson,Adam,calledfromthefrontdoor.“Look,Mam...
問題詳情：My18-month-oldson,Adam,calledfromthefrontdoor.“Look,Mama!Doggie!”IdroppedwhatIwasdoingandstuckmyheadoutofthedoor.Brandy,ournext-doorneighbor’s11-year-olddog,wasoveragain.“Goaway!”Ishouted...