4 Piv txwv ntawm cov nqi uas tau los ntawm kev suav, qhov ntsuas thoob ntiaj teb thiab cov qauv ntsuas chav tsev
| Cov nqi tau los ntawm | Cov mis | Tus nqi tseem ceeb yog dab tsi? | Qhov ntev ntawm cov nqi tau los | Cov Txheej Txheem Thoob Ntiaj Teb ntawm Cov Chav Nyob |
| Lus | Ntev x dav | Ntev (2) | [L2] | m2 |
| Qhov ntim ntawm lub cuboid | Ntev x dav x siab | Ntev (3) | [L3] | m3 |
| Qhov Ceev | Qhov hnyav / Ntim | Qhov hnyav (1), qhov ntev (3) | [M] / [L]3] = [M][L]-3] | Kg / m3 |
| Kecepatan | Qhov Nrug / lub sijhawm | Ntev (1), lub sijhawm (1) | [L] / [T] = [L] [T]-1] | m / s |
| Kev nrawm dua | Ceev / lub sijhawm | Ntev (1), lub sijhawm (2) | [L] [T]-1] / [T] = [L] [T]-2] | m / s2 |
| Gaya | Qhov hnyav x qhov kev nrawm | Qhov hnyav (1), qhov ntev (1), lub sijhawm (2) | [M][L][T]-2] | Kg m/s2 |
| Lag luam | Lub zog x kev hloov pauv | Qhov hnyav (1), qhov ntev (2), lub sijhawm (2) | [M][L][T]-2][L] = [M][L]2][T-2] | Kg m2/s2 |
Yuav kom paub tus lej ntawm cov khoom yooj yim, ua ntej muab cov qauv ntawm cov khoom uas tau muab los.
Qhov ntau tau los: Lub zog
Cov Qauv Fais Fab
P = W / t
Kev piav qhia: P = lub zog, W = ua haujlwm, t = lub sijhawm
Lub sijhawm yog qhov ntau yooj yim, thaum W yog qhov ntau uas tau los ntawm kev siv, yog li txo qhov haujlwm ntxiv kom txog thaum tsuas yog qhov ntau yooj yim xwb.
Cov Qauv Lag Luam
W = F s
Kev piav qhia: W = kev siv zog, F = lub zog, s = kev hloov chaw
Kev hloov chaw yog qhov ntau ntawm qhov ntev, thaum lub zog yog qhov ntau uas tau los ntawm, yog li txo qhov zog ntxiv kom txog thaum tsuas yog qhov ntau tseem ceeb xwb.
Lub zog mis
F = ma
Kev piav qhia: F = lub zog, m = pawg, a = kev ua kom nrawm dua
Qhov hnyav yog qhov ntau ntawm qhov ntev, thaum qhov kev nrawm yog qhov ntau uas tau los ntawm kev siv, yog li ntawd txo qhov kev nrawm ntxiv kom txog thaum tsuas yog qhov ntau ntawm qhov tseem ceeb xwb.
Cov mis hloov pauv sai
ib = v / t
Kev piav qhia: a = kev nrawm, v = qhov ceev, t = lub sijhawm
Lub sijhawm yog ib qho tseem ceeb, thaum qhov ceev yog ib qho tseem ceeb, yog li txo qhov ceev ntxiv kom txog thaum tsuas yog qhov tseem ceeb xwb.
Cov mis ceev
v = s / t
Kev piav qhia: v = qhov ceev, s = kev hloov chaw, t = lub sijhawm
Kev hloov chaw yog qhov ntau ntawm qhov ntev, lub sijhawm yog qhov ntau tseem ceeb.
Cov Qauv Fais Fab
Rov kho dua tus qauv zog:
Kev piav qhia: m = pawg, s = ntev, t = lub sijhawm
Tus nqi tseem ceeb
Lub zog muaj ib qho tseem ceeb ntawm qhov hnyav, ob qho tseem ceeb ntawm qhov ntev thiab peb qho tseem ceeb ntawm lub sijhawm.
Qhov Loj Fais Fab
Raws li cov qauv fais fab uas tsuas yog muaj cov nqi yooj yim saum toj no, qhov ntev ntawm lub zog yog:
[M] [L]2] / [T3] = [M][L]2][T3]
Chav Fais Fab Thoob Ntiaj Teb
Raws li cov qauv fais fab thiab qhov ntev saum toj no, lub chav thoob ntiaj teb ntawm lub zog yog:
Kilogram ' meter ' squared per second cubed (kg m)2/s3)
Cov lus nug txog qhov ntau thiab tsawg
| Cov nqi tau los ntawm | Cov mis tshuaj uas tau los ntawm ntau npaum li cas | Cov nqi uas tau los ntawm muaj pes tsawg cov nqi yooj yim? | Qhov ntev ntawm cov nqi tau los | Lub kaw lus thoob ntiaj teb ntawm cov chav ntsuas tau los |
| Lub Zog | Kev siv zog / lub sijhawm (W / t) | |||
| Lub zog Kinetic | ½ x qhov hnyav x square ntawm qhov ceev ( ½ mv )2) | |||
| Lub zog muaj peev xwm | Qhov hnyav x qhov nrawm vim lub ntiajteb txawj nqus x qhov siab (mgh) | |||
| zog | Qhov hnyav x qhov ceev (mv) | |||
| mem tes | Lub zog x lub sijhawm (F t) | |||
| Lub zog tig | Lub zog x qhov hloov chaw (F s) | |||
| Lub zog hluav taws xob | Lub ntiajteb txawj nqus tas li x lub zog them 1 x lub zog them 2 / square ntawm qhov deb (kqq / r2) | |||
| Lub zog hluav taws xob | Lub zog hluav taws xob x lub sijhawm (I t) | |||
| Lub sijhawm ntawm inertia | Qhov hnyav x lub vojvoog squared (mr)2) | |||
| Siab | Lub zog / thaj chaw (F / A) | |||
| Cov Calories | Qhov hnyav x qhov kub tshwj xeeb x qhov hloov pauv kub (mc T) | |||
| Lub zog ntawm lub teb hluav taws xob | Lub zog hluav taws xob / lub zog hluav taws xob (F / q) |
1. Ua tib zoo saib cov hauv qab no!
Raws li lub rooj saum toj no, qhov ntau thiab tsawg tau los nrog nws chav tsev raug hauv International System yog ...
A. (1), (2), thiab (3)
B. (2), (3) thiab (4)
C. (2), (4) thiab (5)
D. (3), (4) thiab (5)
Kev Sib Tham
Cov khoom siv lub cev muaj ob, uas yog cov nqi yooj yim thiab cov nqi muab los ntawm.
Tus nqi tseem ceeb
Cov nqi yooj yim yog cov nqi lub cev uas lawv cov chav ntsuas tau txiav txim siab ua ntej. 7 cov nqi yooj yim thiab lawv cov chav ntsuas thoob ntiaj teb tau qhia nyob rau hauv lub rooj hauv qab no.
Cov nqi tau los ntawm
Cov nqi uas tau los ntawm cov khoom siv yog cov nqi uas lawv cov chav nyob yog los ntawm cov nqi pib. Ntxiv rau xya cov nqi pib uas tau hais los saum toj no, lwm cov nqi kuj tau los ntawm cov khoom siv. Cov nqi uas tau los ntawm cov lus nug saum toj no yog ntim, qhov ceev, thiab qhov ceev.
volume
Cov mis ntim (piv txwv li ntim ntawm lub voos xwmfab) = ntev x dav x siab
Qhov ntev yog ib chav ntsuas ntawm qhov ntev, qhov dav yog ib chav ntsuas ntawm qhov ntev, thiab qhov siab yog ib chav ntsuas ntawm qhov ntev. Txawm hais tias lawv siv cov lus sib txawv, qhov ntev, qhov dav, thiab qhov siab raug ntsuas siv tib lub cuab yeej ntsuas, uas yog qhov ntev. Qhov ntev, qhov dav, thiab qhov siab kuj muaj tib lub chav ntsuas thoob ntiaj teb, uas yog lub 'meter'. Yog li ntawd, chav ntsuas thoob ntiaj teb ntawm qhov ntim yog 'meter' x 'meter' x 'meter' = 'cubic meter', luv ua m.3
Kecepatan
Cov qauv ceev = kev hloov chaw / lub sijhawm
Kev hloov chaw yog qhov ntau ntawm qhov ntev, thiab lub sijhawm yog qhov ntau ntawm lub sijhawm. Lub chav thoob ntiaj teb ntawm kev hloov chaw yog lub 'meter', thiab lub chav thoob ntiaj teb ntawm lub sijhawm yog qhov thib ob. Yog li ntawd, lub chav thoob ntiaj teb ntawm kev hloov chaw yog lub 'meter'/ob vib nas this, luv m/s.
Qhov Ceev
Cov mis ntawm qhov ceev = pawg / ntim
Qhov hnyav yog ib qho tseem ceeb, thiab qhov ntim yog ib qho khoom muaj nqis. Lub chav thoob ntiaj teb ntawm qhov hnyav yog kilogram, thiab lub chav thoob ntiaj teb ntawm qhov ntim yog cubic meter. Yog li ntawd, lub chav thoob ntiaj teb ntawm qhov ceev yog kilogram/cubic meter, luv kg/m3.
Cov lus teb yog C.
2. Saib daim ntawv teev lus hauv qab no!
Raws li lub rooj, tus lej suav nrog hauv pawg ntau npaum li cas nrog cov chav nyob hauv International System (SI) yog ...
A. (1), (2), thiab (3)
B. (1), (3), thiab (5)
C. (2), (4), thiab (5)
D. (3), (4), thiab (5)
Kev Sib Tham
Cov nqi yooj yim suav nrog (1) pawg thiab (3) ntev. Cov nqi muab tau suav nrog (2) qhov ceev, (4) thaj chaw, (5) hluav taws xob.
Qhov Ceev
Chav ntsuas ntawm qhov ceev yog kilogram/cubic meter, luv kg/m3Saib cov lus piav qhia hauv kev sib tham ntawm lo lus nug lej 1.
Lus
Cov qauv cheeb tsam (piv txwv li thaj tsam ntawm lub xwmfab) = ntev x dav.
Qhov ntev yog ib chav yooj yim ntawm qhov ntev thiab qhov dav yog ib chav yooj yim ntawm qhov ntev. Chav thoob ntiaj teb ntawm qhov ntev yog 'meter' thiab chav thoob ntiaj teb ntawm qhov dav yog 'meter'. Yog li ntawd, chav thoob ntiaj teb ntawm thaj chaw yog 'meter' x 'meter' = 'meter' squared, luv m.2.
Hluav taws xob voltage
Lub chav ntsuas hluav taws xob thoob ntiaj teb lossis qhov sib txawv ntawm lub zog hluav taws xob yog Joule / Coulomb. Lwm lub npe rau chav ntsuas hluav taws xob thoob ntiaj teb yog Volt.
Cov lus teb yog C.
3. Cov lus hauv qab no muaj ntau qhov ntau thiab lawv cov chav.
Cov pab pawg ntawm cov khoom muaj nqis nrog lawv cov chav nyob hauv International System raug qhia los ntawm cov lej...
A. (1), (2), thiab (3)
B. (1), (3), thiab (4)
C. (2), (3), thiab (5)
D. (3), (4), thiab (5)
Kev Sib Tham
Cov nqi yooj yim hauv lub rooj yog (5) Lub zog ntawm lub teeb. Cov nqi uas tau los hauv lub rooj yog (1) ntim, (2) qhov ceev, (3) lub zog, thiab (4) qhov ceev.
volume
Lub chav thoob ntiaj teb ntawm ntim yog lub cubic meter, luv luv m3Saib cov lus piav qhia hauv kev sib tham ntawm lo lus nug lej 1.
Qhov Ceev
Chav ntsuas thoob ntiaj teb ntawm qhov ceev yog kilogram/cubic meter, luv kg/m3. Gram/cm23 tsis yog ib lub koom haum thoob ntiaj teb. Saib cov lus piav qhia hauv kev sib tham ntawm lo lus nug lej 1.
Gaya
Tus qauv rau lub zog = pawg hnyav x kev nrawm. Pawg hnyav yog ib qho tseem ceeb, thiab kev nrawm yog ib qho khoom muaj nqis. Lub chav thoob ntiaj teb ntawm pawg hnyav yog kilogram, luv kg, thiab lub chav thoob ntiaj teb ntawm kev nrawm yog meter/second squared, luv m/s.2Yog li ntawd, lub chav thoob ntiaj teb ntawm lub zog yog kilogram 'meter' / thib ob squared, luv kg m/s2Lub chav no tau muab lub npe tshwj xeeb Newton, los ua kev hwm rau tus kws tshawb fawb Isaac Newton.
Kecepatan
Lub chav ntsuas ceev thoob ntiaj teb yog 'meter'/ob, luv luv m/s. Saib cov lus piav qhia hauv kev sib tham ntawm lo lus nug lej 1.
Cov lus teb yog B.
4. Raws li kev tshuaj xyuas qhov ntev, cov khoom hauv qab no uas muaj tib qhov ntev yog ...
- kev siv zog thiab lub zog
- lub zog thiab lub siab
- lub zog thiab lub zog
- ua haujlwm thiab cua sov
Kev Sib Tham
Nws paub tias:
Qhov Ntev Qhov Ntev = Dav Qhov Ntev = Hloov Chaw Qhov Ntev = L
Lub Sijhawm Ntev = T
Qhov Loj = M
Lus teb:
Qhov Loj ntawm Cheeb Tsam = Qhov Ntev Qhov Loj x Qhov Dav Qhov Loj = [L][L] = [L]2
Qhov Loj ntawm Kev Ceev = Qhov Loj ntawm Kev Hloov Chaw / Qhov Loj ntawm Lub Sijhawm = [L] / [T] = [L][T]-1
Qhov Ntev ntawm Kev Ua Kom Sai = Qhov Ntev ntawm Kev Ceev / Qhov Ntev ntawm Lub Sijhawm = [L][T]-1 / [T] = [L][T]-1[T]-1 = [L][T]-2
Qhov Loj ntawm Lub Zog = Qhov Loj ntawm Pawg Neeg x Qhov Loj ntawm Kev Ua Kom Ceev = [M][L][T]-2
Qhov Loj ntawm Kev Ua Haujlwm = Qhov Loj ntawm Lub Zog x Qhov Loj ntawm Kev Hloov Chaw = [M][L][T]-2 [L] = [M][L]2[T]-2
Qhov Ntsuas Zog = Qhov Ntsuas Kev Siv Zog / Qhov Ntsuas Lub Sijhawm = [M][L]2[T]-2 / [T] = [M][L]2[T]-2[T]-1 = [M][L]2[T]-3
Qhov Loj ntawm Kev Nyuaj Siab = Qhov Loj ntawm Lub Zog / Qhov Loj ntawm Cheeb Tsam = [M][L][T]-2 / [L]2 = [M][L][T]-2 [L]-2 = [M] [L]-1[T]-2
Qhov Loj ntawm Lub Zog = Qhov Loj ntawm Qhov Loj x Qhov Ceev = [M][L][T]-1
Qhov Loj ntawm Kub = Qhov Loj ntawm Zog = Qhov Loj ntawm Kev Ua Haujlwm = [M][L]2[T]-2
Cov lus teb yog D.
Catatan :
Kub yog lub zog uas raug xa mus vim qhov sib txawv ntawm qhov kub thiab txias.
Kev ua haujlwm yog tus txheej txheem ntawm kev hloov lub zog los ntawm kev txav mus los ntawm cov khoom.
Yog li ntawd, qhov ntev ntawm cua sov = qhov ntev ntawm lub zog = qhov ntev ntawm kev ua haujlwm.
