Video: Vim li cas skydivers ncav cuag qhov nrawm nrawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib zaug lub parachute yog qhib, huab cua tsis kam overwhelms lub downward quab yuam ntawm lub ntiajteb txawj nqus. Lub zog net thiab acceleration ntawm qhov poob skydiver yog nce toj. Cov skydiver yog li qeeb. Raws li qhov ceev txo, tus nqi ntawm huab cua kuj txo mus txog rau thaum ib zaug ntxiv skydiver mus txog a terminal ceev.
Ua li no, Skydivers puas ncav cuag qhov nrawm nrawm?
Qhov nruab nrab, skydivers ncav cuag ib terminal ceev ntawm 54 m / s (los yog 177 ft / s)! Nws ceev heev! Skydivers feem ntau hais tias dhia-kev ntxhov siab tsuas yog yaj thaum koj ntaus lub davhlau ya nyob twg . Raws li tau hais ua ntej, koj skydiving tshaj tawm yog ncaj qha ntsig txog qhov projected cheeb tsam.
Kuj Paub, deb npaum li cas koj yuav tsum tau poob mus rau lub davhlau ya nyob twg tshaj tawm? Feem ntau, ib tug neeg poob los ntawm huab cua hauv ntiaj teb mus txog terminal ceev tom qab li 12 vib nas this, uas npog txog 450 meters lossis 1500 ko taw. Ib tug skydiver nyob rau hauv lub plab-rau-lub ntiaj teb txoj hauj lwm mus txog a terminal ceev Txog 195 km / h (54 m / s lossis 121 mph).
Hauv qhov no, vim li cas cov khoom poob mus txog qhov nrawm nrawm?
Raws li ib khoom ntog, nws khaws ceev . Qhov nce hauv ceev ua rau muaj qhov nce ntawm huab cua tsis kam. Thaum kawg, lub zog ntawm huab cua tsis kam ua kom loj txaus kom sib npaug lub zog ntawm lub ntiajteb txawj nqus. Cov khoom hais tias muaj mus txog lub davhlau ya nyob twg.
Vim li cas skydivers nthuav lawv txhais tes thiab txhais ceg?
Vim tias huab cua tsis kam kuj nyob ntawm qhov zoo ntawm cov khoom (koj) thiab yog li los ntawm tucking hauv koj caj npab thiab ceg koj tuaj yeem ncav cuag qhov nrawm nrawm dua li yog tias koj caj npab thiab ceg yog kis mus tawm.
Pom zoo:
Dab tsi yog qhov zoo sib xws thiab qhov sib txawv ntawm qhov nrawm thiab nrawm?
Kev sib piv daim duab piv rau Kev Sib Piv Ceev Ceev Tus Nqi Hloov ntawm qhov kev ncua deb Hloov pauv hloov thaum lub cev rov qab mus rau nws qhov chaw pib Yuav tsis xoom Yuav yog xoom Tsiv khoom Ceev ntawm cov khoom txav tsis tuaj yeem tsis zoo. Kev nrawm ntawm cov khoom txav tuaj yeem yog qhov zoo, tsis zoo lossis xoom
Dab tsi yog qhov txawv ntawm qhov nrawm thiab nrawm nrog piv txwv?
Qhov laj thawj yog yooj yim. Kev nrawm yog lub sij hawm tus nqi ntawm qhov khoom txav mus raws txoj kev, thaum lub nrawm yog tus nqi thiab kev taw qhia ntawm qhov khoom txav. Piv txwv li, 50 km / h (31 mph) piav qhia txog qhov ceev ntawm lub tsheb uas taug kev raws txoj kev, thaum 50 km / teev sab hnub poob piav qhia txog qhov nrawm uas nws tab tom taug kev
Koj qhia li cas yog tias daim duab nrawm nrawm lossis qeeb?
Pib: Saib hauv lub sijhawm [0,1]. Txoj hauj lwm (tshem tawm) yog nce, yog li qhov kev tshaj tawm yog qhov zoo. Tab sis daim duab yog concave down, acceleration yog tsis zoo, yam yog qeeb, kom txog thaum nws ncav cuag tshaj tawm (thiab ceev) 0 thaum lub sij hawm 1
Dab tsi ua rau qhov nrawm nrawm?
Nyob rau hauv physics, lub cim ntawm ib yam khoom acceleration nyob ntawm nws cov kev taw qhia. Kev nrawm tuaj yeem ua rau kom nrawm, txo qis, thiab txawm nyob twj ywm tib yam! Acceleration qhia koj tus nqi ntawm qhov kev hloov pauv. Vim tias qhov nrawm yog vector, koj yuav tsum xav txog qhov kev hloov pauv rau nws qhov loj thiab kev taw qhia
Vim li cas qee cov meteors ncav cuag lub ntiaj teb saum npoo?
Peb cov huab cua yog daim thaiv zoo dua los ntawm meteoroids dua li cov kws tshawb fawb xav, kev tshawb fawb tshiab qhia. Thaum lub hnub qub los ua mob rau lub ntiaj teb, huab cua siab nyob rau hauv pem hauv ntej ntawm nws nkag mus rau hauv nws qhov hws thiab tawg, thawb lub cev ntawm lub hnub qub sib nrug thiab ua rau nws tawg, qhia cov kws tshawb fawb