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Video: Yuav ua li cas koj muab tau elastic muaj peev xwm zog?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Elastic muaj peev xwm zog yog cov muaj peev xwm zog khaws cia los ntawm stretching los yog compressing ib elastic khoom los ntawm ib tug sab nraud quab yuam xws li stretching ntawm a caij nplooj ntoos hlav . Nws yog sib npaug rau cov hauj lwm ua kom ncab tus caij nplooj ntoos hlav uas nyob ntawm qhov caij nplooj ntoos hlav tas li k thiab qhov kev ncua deb stretched.
Ib yam li ntawd, tib neeg nug, dab tsi yog lub mis rau elastic zog?
Elastic muaj peev xwm zog yog sib npaug rau lub zog lub sij hawm ntawm qhov kev ncua deb ntawm kev txav mus los. Elastic muaj peev xwm zog = quab yuam x deb ntawm kev xaav. Vim lub zog yog = caij nplooj ntoos hlav tas li x hloov chaw, ces lub Elastic muaj peev xwm zog = caij nplooj ntoos hlav tas li x displacement squared.
Tsis tas li ntawd, koj yuav nrhiav tau lub zog elastic zog los ntawm daim duab li cas? Lub caij nplooj ntoos hlav tsis tu ncua yog qhov ntsuas qhov tawv ntawm lub caij nplooj ntoos hlav. Hooke txoj cai muab peb lub zog peb xav tau nrhiav elastic muaj peev xwm zog . Saib ntawm a daim duab ntawm kev quab yuam tawm tsam, peb tuaj yeem nrhiav tias cov qauv rau elastic muaj peev xwm zog PE = 1/2(kx^2).
Tib neeg kuj nug, cov mis rau lub zog muaj peev xwm muab tau li cas?
Rau lub gravitational quab yuam qauv yog P. E. = mgh, qhov twg m yog qhov hnyav hauv kilograms, g yog acceleration vim lub ntiajteb txawj nqus (9.8 m / s2 nyob rau saum npoo ntawm lub ntiaj teb) thiab h yog qhov siab hauv meters. Pom tias gravitational muaj peev xwm zog muaj tib units li kinetic zog ,kg m2 /s2.
Yuav ua li cas yog ib co piv txwv ntawm elastic muaj peev xwm zog?
Ntau yam khoom siv tau tsim tshwj xeeb los khaws lub zog muaj peev xwm, piv txwv li:
- Lub caij nplooj ntoos hlav caij nplooj ntoos hlav ntawm lub voj voog.
- Ib tug archer stretched hneev.
- Ib tug bent diving board, ua ntej ib tug divers dhia.
- Cov roj hmab twisted uas ua rau lub dav hlau ua si.
- Ib lub pob bouncy, compressed thaum lub sij hawm nws thaws tawm ntawm phab ntsa cib.
Pom zoo:
Puas muaj peev xwm elastic zog tsis zoo?
Vim tias koj tab tom ua haujlwm rau lub caij nplooj ntoo hlav, piv txwv li hloov lub zog rau nws, koj tau nce lub peev xwm khaws cia hauv nws. Ua kom paub meej txhais tau tias PE yog xoom thaum x = 0 lub zog muaj peev xwm tsis tuaj yeem tsis zoo
Dab tsi yog qhov txawv ntawm electrostatic muaj peev xwm thiab electrostatic muaj peev xwm zog?
Tsis muaj qhov sib txawv ntawm electrostatic potentialenergy thiab hluav taws xob (al) muaj peev xwm zog. Lub peev xwm hluav taws xob ntawm ib qho taw tes yog kev ua haujlwm los ntawm lwm qhov kev quab yuam hauv kev txav chav tsev zoo los ntawm ib qho arbitrarilychosen xoom ntawm lub peev xwm (feem ntau infinity) mus rau lub ntsiab lus
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Yuav ua li cas koj xam cov elastic muaj peev xwm ntawm lub caij nplooj ntoos hlav?
Elastic muaj peev xwm zog yog sib npaug rau lub zog lub sij hawm ntawm qhov kev ncua deb ntawm kev txav mus los. Elastic muaj peev xwm zog = quab yuam x deb ntawm kev xaav. Vim tias lub zog yog = lub caij nplooj ntoos hlav tas li x hloov chaw, ces Elastic muaj peev xwm zog = lub caij nplooj ntoos hlav tas li x hloov chaw squared
Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
Qhov sib txawv ntawm daim nyias nyias muaj peev xwm thiab qhov muaj peev xwm sib npaug (-142 mV) sawv cev rau lub zog hluav taws xob hluav taws xob uas tsav Na + mus rau hauv lub xovtooj ntawm lub peev xwm so membrane. Thaum so, txawm li cas los xij, qhov permeability ntawm daim nyias nyias mus rau Na + tsawg heev kom tsuas yog me me Na + xau rau hauv lub cell