Qhov sib txawv tseem ceeb ntawm kev nrawm thiab lub zog yog qhov nrawm yog hais txog tus nqi ntawm kev hloov pauv hauv qhov nrawm ntawm cov khoom txav, qhov nrawm ntawm ib qho khoom yog qhov khoom ntawm qhov loj ntawm cov khoom thiab nws qhov nrawm.
Acceleration yog tus nqi hloov ntawm qhov nrawm ntawm ib yam khoom nrog rau lub sijhawm. Momentum yog qhov khoom ntawm qhov nrawm thiab qhov inertial loj ntawm cov khoom. Ob qho no yog vectors muaj qhov loj thiab kev coj.
Acceleration yog dab tsi?
Acceleration yog tus nqi hloov ntawm qhov nrawm ntawm ib yam khoom nrog rau lub sijhawm. Qhov no yog vector muaj ob qhov loj thiab kev coj. Peb tuaj yeem tau txais kev taw qhia ntawm ib qho khoom acceleration los ntawm kev taw qhia ntawm lub zog net uas ua rau ntawm qhov khoom. Tsis tas li ntawd, peb tuaj yeem txiav txim siab qhov loj ntawm qhov nrawm los ntawm Newton txoj cai thib ob. SI unit rau kev ntsuas ntawm acceleration yog ' meter ' ib ob squared (m / s 2).
Daim duab 01: Kev nrawm nrawm; Tus nqi hloov ntawm Velocity
Hais txog cov khoom ntawm acceleration, qhov nruab nrab acceleration ntawm ib yam khoom nyob rau hauv ib lub sij hawm lub sij hawm yog qhov kev hloov ntawm nws tshaj tawm uas muab faib los ntawm lub sij hawm ntawm lub sij hawm. Instantaneous acceleration yog ib daim ntawv ntawm accelerations qhov twg qhov kev txwv ntawm qhov nruab nrab acceleration yog dhau ib lub sij hawm infinitesimal. Nyob rau hauv lwm yam lus, nws yog derivative ntawm lub nrawm vector nrog rau lub sij hawm. Lwm cov ntaub ntawv tseem ceeb suav nrog centripetal acceleration thiab centrifugal acceleration, uas tshwm sim vim muaj zog ua rau ib yam khoom uas txav mus rau hauv txoj kev ncig.
Lub zog yog dab tsi?
Momentum yog qhov khoom ntawm qhov nrawm thiab qhov inertial loj ntawm cov khoom. Nws kuj yog ib tug vector uas muaj ob qho tib si loj thiab kev coj. Lub acceleration tau piav nyob rau hauv Newton tus qauv yog qhov tseeb ntawm lub zog. Nws hais tias lub zog yuav txuag tau yog tias tsis muaj lub zog sab nraud ua rau lub kaw lus kaw. Peb tuaj yeem pom qhov no hauv cov cuab yeej yooj yim "cov khoom sib npaug" lossis Newton lub txaj. Nws muaj ob lub ntsiab ntawm lub zog raws li lub zog linear thiab lub zog angular.
Daim duab 02: Newton's Cradle
Linear momentum yog ib qho tseem ceeb heev ntawm cov khoom txav. Peb tuaj yeem siv lo lus linear momentum los piav txog ib qho khoom txav ntawm txoj kev ncaj nraim. Lub zog ntawm ib yam khoom yog sib npaug rau qhov loj ntawm cov khoom sib npaug los ntawm kev tshaj tawm ntawm cov khoom (p=mv). Txij li cov huab hwm coj yog scalar, linear momentum yog vector, uas muaj tib txoj kev coj raws li qhov tshaj tawm.
Angular momentum piav txog ib yam khoom nrog lub suab angular. Txhawm rau txhais lub zog angular, ib tus yuav tsum xub paub tias lub sijhawm ntawm inertia yog dab tsi. Lub sij hawm ntawm inertia ntawm ib yam khoom yog ib yam khoom uas nyob ntawm ob qhov loj ntawm cov khoom thiab qhov loj faib los ntawm qhov chaw uas peb ntsuas lub sij hawm ntawm inertia. Yog tias tag nrho cov huab hwm coj raug faib los ze zog rau lub axis rotational, lub sij hawm ntawm inertia yog qis dua. Txawm li cas los xij, yog tias huab hwm coj nthuav tawm deb ntawm qhov axis, lub sijhawm ntawm inertia siab dua.
Dab tsi yog qhov zoo sib xws ntawm Kev nrawm thiab lub zog?
- Acceleration and momentum is related to the speed of a txav khoom.
- Ob leeg yog vectors muaj qhov loj thiab kev coj.
Qhov txawv ntawm Kev nrawm thiab lub zog yog dab tsi?
Kev nrawm thiab lub zog muaj feem cuam tshuam rau qhov nrawm ntawm qhov khoom txav. Qhov sib txawv tseem ceeb ntawm kev nrawm thiab lub zog yog qhov nrawm yog hais txog qhov hloov pauv ntawm qhov nrawm ntawm cov khoom txav, qhov lub zog ntawm ib qho khoom yog qhov khoom ntawm qhov loj ntawm cov khoom thiab nws qhov tshaj tawm.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm kev nrawm thiab lub zog hauv daim ntawv teev npe.
Summary – Acceleration vs Momentum
Ob qho tib si acceleration thiab momentum yog vectors muaj qhov loj thiab kev taw qhia. Qhov sib txawv tseem ceeb ntawm acceleration thiab momentum yog acceleration yog hais txog tus nqi ntawm kev hloov nyob rau hauv tshaj tawm ntawm ib tug txav khoom, whereas lub momentum ntawm ib yam khoom yog cov khoom ntawm qhov loj ntawm cov khoom thiab nws tshaj tawm.
