Ceev yog lub sijhawm tus nqi ntawm qhov khoom txav mus raws txoj kev, thaum nrawm yog tus nqi thiab kev taw qhia ntawm qhov khoom txav. … Piv txwv li, 50 km/hr (31 mph) piav txog qhov ceev uas lub tsheb taug kev raws txoj kev, thaum 50 km/hr sab hnub poob piav txog qhov ceev uas nws mus.
plaub qhov sib txawv ntawm qhov nrawm thiab nrawm yog dab tsi?
Nws yog tus nqi ntawm qhov kev ncua deb yog them los ntawm ib qho khoom. Kev nrawm yog hais txog tus nqi uas ib qho khoom hloov pauv lawv txoj haujlwm hauv ib qho kev taw qhia. Nws yog scalar kom muaj nuj nqis raws li nws muaj qhov loj xwb.
Qhov sib txawv ntawm qhov nrawm thiab nrawm yog dab tsi?
Kev nrawm yog txhais raws li qhov kev ncua deb ntawm lub cev nyob rau hauv ib lub sijhawm. Kev nrawm yog txhais tau tias yog kev hloov pauv ntawm lub cev hauv ib lub sijhawm. Nws yog scalar kom muaj nuj nqis. … Ceev ntawm lub cev yog qhov zoo lossis xoom.
Qhov txawv ntawm qhov nrawm thiab nrawm hauv kev ua si yog dab tsi?
Kev nrawm yog qhov hloov pauv ntawm kev ncua deb thiab yog qhov ntsuas qhov ntau. Kev nrawm yog qhov nrawm ntawm lub cev hauv ib qho kev taw qhia tshwj xeeb thiab yog tus nqi hloov pauv. Tsis zoo li qhov nrawm, qhov nrawm yog vector kom muaj nuj nqis uas txhais tau tias nws muaj kev taw qhia thiab qhov loj.
Qhov zoo sib xws thiab qhov sib txawv ntawm qhov nrawm thiab nrawm yog dab tsi?
Kev nrawm thiab nrawm ob qho tib si sawv cev rau txoj hauv kev los ntsuas qhov hloov pauv hauvtxoj hauj lwm ntawm ib yam khoom txheeb ze rau lub sijhawm. Qhov tseeb, rau ib txoj kab ncaj nraim, qhov nrawm thiab nrawm ntawm ib qho khoom yog tib yam (vim qhov kev ncua deb thiab qhov chaw yuav zoo ib yam). Ceev thiab tshaj tawm yog ntsuas nyob rau hauv tib units: meters ib ob los yog m/s.
