Lub zog yog "thawb" lossis "rub" ua haujlwm ntawm ib yam khoom kom txav nws lossis ua kom nrawm dua. Newton txoj cai lij choj thib ob piav qhia txog yuav ua li cas quab yuam cuam tshuam nrog huab cua thiab nrawm, thiab qhov kev sib raug zoo no yog siv los laij lub zog. Feem ntau, qhov hnyav ntawm cov khoom, qhov ntau dua qhov quab yuam yuav tsum tau txav nws.
Kauj ruam
Ntu 1 ntawm 2: Paub Cov Qauv
Kauj Ruam 1. Muab cov pawg los ntawm qhov nrawm
Lub zog (F) xav kom txav cov khoom ntawm qhov hnyav (m) nrog kev nrawm (a) tau txhais los ntawm F = m x a. Yog li, quab yuam = pawg sib npaug los ntawm kev nrawm.
Kauj Ruam 2. Hloov cov lej ua SI qhov tseem ceeb
Cov Txheej Txheem Thoob Ntiaj Teb ntawm Cov Chav (SI) rau qhov hnyav yog qhov hnyav, thiab chav SI rau kev nrawm yog m/s2 (meters ib ob thib ob). Yog li, yog tias qhov hnyav thiab nrawm tau hais tawm hauv SI units, tom qab ntawd SI chav ntawm lub zog yog N (Newton).
Piv txwv li, yog tias qhov khoom hnyav yog 3 phaus, hloov phaus mus rau kilograms. 3 phaus = 1.36 kg, yog li qhov hnyav ntawm qhov khoom yog 1.36 kg
Kauj Ruam 3. Kom nco ntsoov tias qhov hnyav thiab qhov hnyav yog ob yam sib txawv hauv Physics
Yog qhov hnyav ntawm qhov khoom tau hais hauv N (Newtons), faib nws los ntawm 9.8 kom tau txais qhov sib npaug sib npaug. Piv txwv li, qhov hnyav ntawm 10 N yog sib npaug rau 10/9.8 = 1.02 kg.
Ntu 2 ntawm 2: Siv Cov Qauv
Kauj Ruam 1. Nrhiav lub zog uas yuav tsum tau nrawm tsheb 1000 kg nrog kev nrawm ntawm 5 m/s2.
- Xyuas kom tseeb tias txhua qhov txiaj ntsig nyob hauv chav SI raug.
- Muab tus nqi nrawm (1000 kg) los ntawm 5 m/s2 los xam tus nqi.
Kauj Ruam 2. Xeem lub zog xav tau kom nrawm lub laub 8-phaus txav ntawm 7 m/s2.
- Ua ntej, hloov tag nrho koj cov koog mus rau SI. Ib phaus sib npaug 0.453 kg, yog li muab tus nqi ntawd los ntawm 8 phaus los txiav txim siab qhov hnyav.
- Muab tus nqi tshiab rau qhov hnyav (3.62 kg) los ntawm tus nqi nrawm (7 m/s2).
Kauj Ruam 3. Nrhiav qhov loj ntawm qhov quab yuam ua rau ntawm lub pob tawb uas hnyav 100 N thiab nrawm ntawm 2.5 m/s2.
- Nco ntsoov, 10 N sib npaug 9.8 kg. Yog li hloov Newtons rau kg los ntawm kev faib tus nqi los ntawm 9.8 kg. Tus nqi kg tshiab rau qhov hnyav yog 10.2 kg.
- Sib npaug tus nqi huab hwm coj tshiab (10.2 kg) los ntawm kev nrawm (2.5 m/s2).
Lub tswv yim
- Ib txwm nyeem cov lus nug kom zoo txhawm rau txiav txim siab qhov hnyav lossis hnyav.
- Lub ntsiab lus ntawm Newton, tus txheej txheem ntawm kev quab yuam, yog N = kg * m/s^2.
- Nco ntsoov tias txhua tus lej tau hloov pauv mus rau kilograms thiab m/s^2.
