Koj qhia li cas yog tias daim duab nrawm nrawm lossis qeeb?
Koj qhia li cas yog tias daim duab nrawm nrawm lossis qeeb?

Video: Koj qhia li cas yog tias daim duab nrawm nrawm lossis qeeb?

Video: Koj qhia li cas yog tias daim duab nrawm nrawm lossis qeeb?
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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 lub daim duab yog concave nqes , cov kev ceev yog qhov tsis zoo, qhov yog qeeb qeeb , kom txog thaum nws ncav cuag qhov nrawm (thiab ceev ) 0 te 1.

Xav txog qhov no, koj yuav qhia li cas yog tias qhov nrawm nce lossis txo qis ntawm daim duab?

Nco ntsoov tias thaum acceleration yog tsis zoo - nyob rau hauv lub ncua sij hawm [0, 2) - uas txhais tau hais tias lub ceev yog txo . Thaum twg acceleration yog qhov zoo - ntawm lub caij (2, 4] - lub nrawm nce . Kev nrawm nrawm thiab qeeb qeeb.

Ib tug kuj yuav nug, dab tsi yog qhov zoo acceleration? Zoo acceleration yog qhov hloov qhov ceev ntawm ib yam khoom nyob rau hauv lub zoo kev taw qhia, raws li tau hais tseg rau qhov system.

Ib yam li ntawd, koj tuaj yeem nug, cov duab twg sawv cev rau ib qho khoom uas ua kom nrawm?

Ib txoj kab nqes rau ntawm daim duab ceev-lub sij hawm sawv cev rau ib qho kev ceev . Txoj kab nqes hav qhia tau hais tias qhov ceev ntawm qhov khoom hloov pauv. Cov khoom yog ua kom ceev lossis qeeb. Lub steeper txoj kab nqes ntawm txoj kab ntau dua kev ceev.

Yuav ua li cas acceleration yuav xam?

Rearrange qhov sib npaug F = ma los daws rau kev ceev . Koj tuaj yeem hloov cov qauv no ib puag ncig los daws rau kev ceev los ntawm kev faib ob sab los ntawm qhov loj, yog li: a = F / m. Yuav nrhiav tau kev ceev , tsuas yog faib cov quab yuam los ntawm qhov loj ntawm cov khoom tau nrawm.

Pom zoo: