Terminal velocity yog qhov siab tshaj plaws (ceev) ua tau los ntawm ib qho khoom thaum nws ntog los ntawm cov kua dej (cua yog qhov piv txwv tshaj plaws). … Thaum lub sij hawm no cov khoom nres accelerating thiab txuas ntxiv ntog ntawm qhov ceev tsis tu ncua hu ua lub davhlau ya nyob twg tshaj tawm (tseem hu ua settling velocity).
Koj pom qhov nrawm tshaj plaws li cas?
Tam sim no, peb paub tias qhov nrawm tshaj plaws thaum y=0, piv txwv li, kev hloov pauv yog xoom thiab nrawm yog xoom, uas txhais tau hais tias lub kaw lus nyob hauv qhov sib npaug. Yog li ntawd, ntawm qhov taw tes hauv kev sib haum xeeb yooj yim, qhov siab tshaj plaws tuaj yeem suav nrog siv formula v=Aω.
Puas siab tshaj qhov nrawm tshaj plaws?
Qhov siab tshaj plaws yog top-kawg ceev. Nws yog lub sijhawm ntawd thaum koj tsis tuaj yeem nrawm dua. Txog rau lub sijhawm ntawd, qhov zoo (rau pem hauv ntej) kab rov tav quab yuam koj tau tsim tau loj dua qhov tsis zoo (tawm tsam) quab yuam-qhov tsis zoo quab yuam yog kev sib xyaw ntawm braking force thiab luag (air resistance).
Qhov twg hauv qab no muaj qhov nrawm tshaj plaws?
Cov lus teb yog Lub teeb . Qhov ceev ntawm lub teeb nyob rau hauv huab cua yog 3 × 10 8 m / s. Qhov ceev ntawm lub teeb nyob rau hauv lub nqus tsev vacuum yog 186, 282 mais ib ob (299, 792 kilometers ib ob). Hauv txoj kev xav, tsis muaj dab tsi tuaj yeem taug kev nrawm dua li lub teeb.
Qhov siab tshaj plaws ntawm qhov khoom poob yog dab tsi?
Nyob ze ntawm lub ntiaj teb, ib yam khoom hauv lub caij nplooj zeeg dawb hauv lub tshuab nqus tsev yuav nrawm ntawm kwv yees li 9.8 m / s 2,ywj siab ntawm nws pawg. Nrog rau huab cua tsis kam ua rau cov khoom uas tau poob lawm, cov khoom yuav nws thiaj li ncav cuag qhov nrawm nrawm, uas nyob ib puag ncig 53 m / s (190 km / h lossis 118 mph)rau tib neeg skydiver.
