Video: Yuav hloov pauv li cas thaum tsis ceev?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ceev ceev yog vector kom muaj nuj nqis, uas txhais tau hais tias nws qhia qhov loj thiab kev taw qhia. Yog li ib txoj kev a ceev ntawm ib yam khoom yuav yog hloov , tsis muaj nws ceev hloov yog los ntawm hloov nws yog kev taw qhia. Ib qho piv txwv ntawm qhov no yog nyob rau hauv lub voj voog, qhov twg ib qho khoom ib txwm muaj hloov kev taw qhia thaum muaj qhov tsis tu ncua ceev.
Hauv qhov no, yuav ua li cas nrawm hloov txawm tias qhov nrawm zoo li qub?
Ceev ceev yog vector, uas txhais tau hais tias nws muaj qhov loj (tus nqi tus lej) thiab kev taw qhia. Yog li cov ceev tau hloov los ntawm hloov tus ceev los yog los ntawm hloov txoj kev taw qhia (los yog ob qho tib si). Cov ceev tseem nyob tas li, tab sis cov kev taw qhia ntawm kev txav yog tsis tu ncua hloov.
Qhov thib ob, koj hloov ceev mus rau qhov nrawm li cas? Qhov ceev yog ntsuas raws li qhov kev ncua deb ntawm lub sijhawm.
- Ceev = Distance Time.
- Ceev = Δs Δt.
- 1 m 1 s × 1 km 1000 m × 3600 s 1 h = 3600 m · km · s 1000 s · m · h = 3.6 km 1 h.
- Ceev = Distance Time.
- Velocity = Lub Sijhawm Tawm Tsam nyob rau hauv ib qho kev taw qhia.
Ib yam li ntawd, tib neeg nug, yuav ua li cas lub nrawm ntawm cov khoom hloov yog tias qhov ceev tsis tau?
A hloov hauv ceev ,lub a hloov in direction, los yog a hloov hauv ob qho tib si ceev thiab kev taw qhia txhais tau tias tus khoom muaj a hloov hauv ceev . Nkag siab tias hauv physics qhov no txhais tau tias yog koj tig ib ces kaum, txawm yog koj ceev yog tsis tu ncua, koj ceev hloov . Feem ntau cov ceev ntawm ib yam khoom tsis yog tas li.
Puas yog qhov nruab nrab tshaj tawm tib yam li kev hloov pauv hauv kev tshaj tawm?
Ceev, ua ib tug scalar kom muaj nuj nqis, yog tus nqi ntawm ib yam khoom npog qhov deb. Ntawm qhov tod tes, ceev yog vector kom muaj nuj nqis; nws yog kev taw qhia-paub. Ceev ceev yog tus nqi ntawm qhov chaw kev hloov . Cov nruab nrab ceev yog qhov hloov chaw lossis txoj haujlwm hloov (ib vector kom muaj nuj nqis) ib lub sij hawm piv.
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