Speed vs Velocity
Kev nrawm thiab nrawm yog ob lub ntsiab lus tseem ceeb hauv kev tshawb fawb, thiab txawm tias zoo sib xws, lawv txawv ntawm ib leeg. Tib neeg ib txwm tsis meej pem seb lawv yuav tsum siv ib lossis lwm qhov thaum tham txog ib qho khoom txav. Txhawm rau pab tshem tawm qhov tsis meej pem, kab lus no yuav qhia qhov txawv ntawm ob nqe lus no thiab lawv cov khoom.
Koj yuav tsum paub txog cov ntsiab lus ntawm kev ncua deb thiab kev txav chaw. Txhawm rau kom nkag siab qhov sib txawv ntawm qhov nrawm thiab nrawm, nws yog qhov zoo dua los txhuam qhov sib txawv ntawm qhov kev ncua deb thiab kev txav mus los. Nws yog ib qho yooj yim mus nrhiav tau qhov kev ncua deb mus los ntawm ib lub pob uas tau muab pov rau saum huab cua thiab nqis los rau tib qho chaw. Tab sis qhov txav ntawm lub pob yog xoom raws li nws rov qab los rau nws qhov chaw pib. Tib yam tuaj yeem hais txog koj tus menyuam dev thaum nws rov qab nrog lub pob hauv nws lub qhov ncauj rau koj. Koj puas tau pom tus ntsaum tsiv ntawm no thiab qhov ntawd txhua lub sijhawm thiab npog ntau qhov deb tab sis xaus li ob peb taw lossis tsawg dua ntawm kev hloov pauv?
Lub tswvyim tib yam siv rau kev nrawm thiab nrawm. Qhov twg raws li qhov ceev yog qhov ntau npaum li cas uas tsuas qhia koj tias qhov khoom txav nrawm npaum li cas, kev tshaj tawm kuj qhia koj txog kev taw qhia ntawm lub cev txav. Velocity yog vector kom muaj nuj nqis uas qhia koj tus nqi ntawm qhov khoom hloov nws txoj haujlwm. Qhov no yog vim li cas thaum hais txog qhov nrawm ntawm ib qho khoom; Nws tsis txaus sau nws tsuas yog hauv Km / ph vim qhov no yog txoj kev sau nrawm, thiab sau nrawm, kev taw qhia kuj yuav tsum tau hais. Yog li qhov sib txawv loj ntawm qhov nrawm thiab nrawm yog qhov ceev tsis ua raws li kev taw qhia thaum kev taw qhia yog qhov yuav tsum tau tshaj tawm. Los yog nyob rau hauv lwm yam lus, tshaj tawm yog ceev nrog kev coj.
Yog li thaum nrawm=nrug / sijhawm, Velocity=Tawm / sijhawm.
Peb paub tias kev hloov pauv yog txoj kev luv tshaj plaws ntawm ob lub ntsiab lus thiab yog li kev nrawm yog tsawg dua lossis qhov zoo tshaj plaws sib npaug rau qhov nrawm ntawm cov khoom txav.
In luv:
• Ceev yog tus nqi ntawm qhov khoom txav thaum lub nrawm kuj tseem xav txog qhov kev taw qhia ntawm qhov khoom txav.
• Txhawm rau xam qhov nrawm, qhov kev ncua deb muab faib los ntawm lub sijhawm siv thaum xam, ib tus yuav tsum paub qhov kev hloov pauv ntawm qhov khoom.
• Ceev yog qhov ntau npaum li cas thaum qhov nrawm yog vector kom muaj nuj nqis.
