Angular Velocity vs Linear Velocity
Angular tshaj tawm thiab tawm tshaj tawm yog ob hom kev tshaj tawm, uas tau siv rau hauv qhov tseeb ntawm thaj chaw. Kab lus no hais txog cov ntsiab lus, qhov zoo sib xws thiab qhov sib txawv ntawm qhov nrawm nrawm thiab qhov nrawm nrawm.
Kab nrawm nrawm
Linear tshaj tawm yog txhais raws li tus nqi ntawm kev hloov pauv ntawm qhov khoom thiab qhov chaw ruaj khov. Kev hais lus lej, qhov nrawm sib npaug dx / dt (nyeem li d, dt x) raws li kev xav ntawm kev suav lej. Nws kuj tseem muaj nyob rau hauv ẋ. Linear velocity yog vector kom muaj nuj nqis. Linear tshaj tawm muaj cov kev taw qhia ntawm instantaneous txav. Velocity yog qhov sib txawv ntawm qhov sib txawv, uas txhais tau hais tias cov kev cai ntawm kev sib raug zoo yuav tsum tau siv rau kev tshaj tawm sib xws nrog qhov ceev ntawm lub teeb. Relative velocity yog qhov nrawm ntawm ib yam khoom uas txheeb ze rau lwm yam khoom. Hauv daim ntawv vector, qhov no sau ua V̰A rel B=V̰A – V̰B V̰ rel yog qhov nrawm ntawm cov khoom "A" txheeb ze rau qhov khoom "B". Feem ntau ib daim duab peb sab nrawm los yog qhov nrawm nrawm yog siv los xam cov txheeb ze tshaj tawm ntawm ob yam khoom. Velocity triangle theory hais tias yog VA rel Earth thiab VEarth rel B yog qhia nyob rau hauv ob sab ntawm daim duab peb sab proportional rau qhov loj thiab kev taw qhia, kab thib peb qhia qhov kev taw qhia thiab qhov loj ntawm tus txheeb ze tshaj tawm. Linear tshaj tawm yog ntsuas hauv meters ib ob. Lub ntsiab txhais ntawm cov kab nrawm kuj tuaj yeem raug coj los ua qhov kev hloov ntawm cov khoom ntawm ib lub sijhawm. Qhov loj ntawm linear tshaj tawm ib leeg qhia qhov ceev ntawm cov khoom.
Angular Velocity
Angular tshaj tawm yog ib qho kev tshwm sim uas tau tham hauv cov lus tsa suab. Cov lus tsa suab zoo li cov hniav ntawm lub kiv cua tig los yog lub log khiav muaj cov lus tsa suab. Rau cov lus tsa suab, lub kaum sab xis rub tawm radial yog siv. Ib sab ntawm lub kaum sab xis txav nrog cov khoom raws li lwm qhov tseem nyob nrog kev hwm rau lub ntiaj teb. Lub kaum sab xis yog hu ua angular displacement. Tus nqi ntawm kev hloov ntawm lub kaum sab xis yog lub npe hu ua angular tshaj tawm thiab tus nqi ntawm kev hloov ntawm angular tshaj tawm yog hu ua angular acceleration. Chav tsev ntawm angular tshaj tawm yog radians ib thib ob, lossis tuaj yeem hais tawm hauv kev hloov pauv ib thib ob. Ib qho kev hloov pauv ntawm qhov nrawm nrawm ntawm ib qho khoom yuav tsum muaj lub zog sab nraud ua rau lub cev. Lwm cov cuab yeej sib tham nrog lub angular tshaj tawm yog lub angular momentum. Angular momentum yog sib npaug rau cov khoom ntawm lub sij hawm ntawm inertial ntawm cov khoom hais txog lub rotational axis thiab lub angular tshaj tawm. Lub zog rotational kinetic ntawm lub cev yog sib npaug rau cov khoom ntawm lub sijhawm ntawm inertia thiab angular tshaj tawm squared thiab muab faib los ntawm ob. Angular velocity yog qhov tsim nyog kom muaj nuj nqis uas ua rau peb pom tias qhov khoom txav nrawm npaum li cas. Qhov no feem ntau yog txhais los ntawm ω.
Qhov txawv ntawm Angular Velocity thiab Linear Velocity yog dab tsi?
• Lub zog ib txwm yuav tsum ua kom lub nrawm nrawm, tab sis qhov nrawm nrawm tsis tas yuav tsum muaj lub zog.
• Angular velocity multiplied by the radius of movement yields the instantaneous linear speed of the object.
• Linear tshaj tawm yog ntsuas hauv meters ib thib ob, thaum lub nrawm nrawm ntsuas hauv radians ib ob.
