Gravitational Potential Energy vs Elastic Potential Energy
Gravitational muaj peev xwm zog thiab elastic muaj peev xwm muaj peev xwm yog ob qho tseem ceeb sib tham hauv cov tshuab. Kab lus no yuav sim los sib piv thiab sib piv qhov lawv txhais li cas, lawv qhov zoo sib xws thiab qhov sib txawv.
Dab tsi yog Gravitational Potential Zog?
Txhawm rau nkag siab lub zog muaj peev xwm nqus tau, yuav tsum muaj kev paub keeb kwm yav dhau los hauv thaj chaw gravitational. Lub ntiajteb txawj nqus yog lub zog uas tshwm sim vim muaj ib qho loj. Mass yog qhov tsim nyog thiab qhov xwm txheej txaus rau lub ntiajteb txawj nqus. Muaj ib qho gravitational teb hais tias nyob ib ncig ntawm txhua qhov loj. Muab cov m1 thiab m2 tso rau hauv qhov deb r ntawm ib leeg. Lub zog gravitational ntawm ob pawg no yog G.m1.m2/r2, qhov twg G yog lub ntiaj teb gravitational tas li. Txij li cov huab hwm coj tsis zoo tsis muaj nyob, lub zog gravitational yeej ib txwm nyiam. Tsis muaj zog gravitational quab yuam. Nws yuav tsum tau muab sau tseg tias gravitational rog kuj yog kev sib nrig sib. Qhov ntawd txhais tau tias, lub zog m1 tawm ntawm m2 yog sib npaug thiab rov qab rau lub zog m2 yog exerting ntawm m1. Lub peev xwm gravitational ntawm ib qho taw tes yog txhais raws li tus nqi ntawm kev ua haujlwm ntawm ib chav tsev thaum coj nws los ntawm infinity mus rau qhov muab. Txij li thaum lub peev xwm gravitational ntawm infinity yog xoom thiab cov haujlwm yuav tsum tau ua yog qhov tsis zoo, lub peev xwm gravitational yeej ib txwm tsis zoo. Lub zog gravitational muaj peev xwm ntawm ib yam khoom yog txhais raws li kev ua haujlwm ntawm cov khoom thaum cov khoom raug coj los ntawm infinity mus rau qhov hais. Qhov no kuj yog sib npaug rau cov khoom ntawm lub peev xwm gravitational thiab qhov loj ntawm cov khoom. Txij li thaum qhov loj ntawm cov khoom yog ib txwm zoo thiab gravitational muaj peev xwm ntawm txhua qhov taw tes yog qhov tsis zoo, lub zog gravitational ntawm txhua yam khoom kuj tsis zoo.
Elastic Potential Zog yog dab tsi?
Elasticity yog ib yam khoom muaj txiaj ntsig zoo ntawm cov teeb meem. Nws yog lub peev xwm ntawm cov ntaub ntawv rov qab mus rau lawv qhov qub qub tom qab cov rog sab nraud raug tshem tawm. Nws tau pom tias lub zog yuav tsum tau ua kom tus pas nrig elastic ncab yog proportional rau qhov ntev ntawm tus pas nrig. Qhov proportionality qhov tsis tu ncua yog lub npe hu ua lub caij nplooj ntoos hlav tas li thiab yog siv k. Qhov no muab peb qhov sib npaug F=-kx. Lub cim rho tawm sawv cev rau qhov kev taw qhia rov qab ntawm x mus rau lub zog. Lub zog muaj peev xwm elastic yog qhov ua haujlwm uas yuav tsum tau ncab cov khoom elastic los ntawm qhov muab ntev x. Txij li thaum lub zog siv F(x)=kx, txoj haujlwm ua tiav yog sib npaug rau kev sib xyaw ntawm F (x) ntawm xoom rau x, nrog rau dx, uas yog sib npaug rau kx2 /2. Yog li ntawd, lub zog muaj peev xwm yog kx2/2. Nws yuav tsum raug sau tseg tias lub zog muaj peev xwm ntawm txhua yam khoom txuas mus rau qhov kawg ntawm tus pas nrig tsis yog nyob ntawm qhov loj ntawm cov khoom tab sis tsuas yog nyob rau lub caij nplooj ntoos hlav tas li, thiab qhov ntev ntev.
Dab tsi yog qhov txawv ntawm gravitational thiab elastic muaj peev xwm zog?
• Lub zog muaj peev xwm nqus tau ib txwm tsis zoo thaum lub zog elastic zog ib txwm zoo.
• Gravitational muaj peev xwm zog nyob ntawm qhov loj ntawm cov khoom, tab sis elastic muaj peev xwm zog tsis nyob ntawm qhov loj.
