Piv txwv ntawm Cov Lus Nug Txog Linear Motion Graph

13 Piv txwv ntawm Cov Lus Nug Txog Linear Motion Graph

1. Los ntawm daim duab saum toj no, qhov uas qhia txog ib yam khoom uas so yog...
A. (1)
B. (2)
C. (3)
D. (4)
E. (5)
Kev Sib Tham
Ib yam khoom uas so yog qhia los ntawm ib txoj kab kab rov tav perpendicular rau qhov deb axis (s). Txoj kab ncaj no qhia tias qhov deb tseem ruaj khov thaum lub sijhawm nce ntxiv.
Cov lus teb yog C.

2. Kev txav ntawm ib yam khoom yog kos duab los ntawm daim duab qhia txog qhov chaw (s) piv rau lub sijhawm (t) raws li pom hauv daim duab hauv qab no. Ib feem ntawm daim duab uas qhia txog yam khoom so yog ib feem...
A. (1)
B. (2)
C. (3)
D. (4)
E. (5)
Kev Sib Tham
Kab xub kab rov tav mus rau sab xis = lub sijhawm axis (t). Thaum kab txav mus rau sab xis, lub sijhawm nce ntxiv. Kab xub ntsug mus rau sab saud = qhov chaw axis (s). Kab nce mus rau saum, qhov chaw nce ntxiv. Ib yam khoom nyob twj ywm, txhais tau tias qhov chaw ntawm yam khoom ruaj khov, piv txwv li tsis hloov pauv.
(1) Daim duab 1 qhia tias qhov chaw ntawm yam khoom nce ntxiv raws sijhawm (yam khoom txav mus tom ntej).
(2) Daim Duab 2 qhia qhov chaw ntawm ib yam khoom ruaj khov dhau sijhawm (yam khoom ntawd nyob ruaj khov lossis tsis txav mus los).
(3) Daim duab 3 qhia tias qhov chaw ntawm yam khoom nce ntxiv raws sijhawm (yam khoom txav mus tom ntej).
(4) Daim duab 4 qhia qhov chaw ntawm yam khoom txo qis zuj zus raws sijhawm (yam khoom txav rov qab).
(5) Daim duab 5 qhia tias qhov chaw ntawm yam khoom nce ntxiv raws sijhawm (yam khoom txav mus tom ntej).
Cov lus teb yog B.

3. Daim duab hauv qab no yog daim duab GLBB, qhov twg v sawv cev rau qhov ceev thiab t sawv cev rau lub sijhawm. Qhov loj ntawm qhov kev nrawm ntawm yam khoom los ntawm daim duab yog...
A. 50 ms^-2
B. 25 ms^-2
C. 10 ms^-2
D. 5 ms^-2
E. 2,5 ms^-2
Kev Sib Tham

4. Ib tug neeg caij tsheb los ntawm lub nroog A mus rau lub nroog B, raws li pom hauv daim duab hauv qab no, Y axis yog qhov ceev thiab X axis yog lub sijhawm, yog li qhov deb uas lub tsheb tau mus thaum lub sijhawm txij li 30 feeb mus txog 60 feeb yog...
A. 10 km
B. 15 km
C. 20 km
D. 30 km
Sab hnub tuaj 40 km
Kev Sib Tham
Nws paub tias:
Ceev (v) = 40 km/h
Lub Sijhawm Sib Npaug (t) = 60 – 30 = 30 feeb = 0,5 teev
Nug: Qhov deb uas tau mus
Lus teb:
Txij li 30 feeb mus txog 60 feeb, lub tshebkev txav mus los ncaj nraim.
Qhov deb = ceev x lub sijhawm
Qhov Nrug Deb = (40 km/h)(0,5 teev)
Qhov Nrug Deb = 20 km
Cov lus teb yog C.

5. Daim duab (vt) qhia txog kev txav ntawm lub tsheb txij thaum so, ces txav mus txog thaum nws nres rau 8 vib nas this raws li pom hauv daim duab.
Qhov deb uas lub tsheb taug kev ntawm t = 5 s mus rau t = 8 s yog…..
A. 60 m
B. 50 m
C. 35 m
D. 20 m
E. 15 m
Kev Sib Tham
Qhov uas nug hauv lo lus nug no yog qhov deb uas tau mus ncig ntawm lub sijhawm t = 5 vib nas this mus rau t = 8 vib nas this.
Thaj tsam ntawm lub dav hlau 1 = thaj tsam ntawm daim duab peb sab CD = ½ (6-5)(40-20) = ½ (1)(20) = 10
Thaj tsam ntawm lub dav hlau 2 = thaj tsam ntawm lub duab peb ceg DE = ½ (8-6)(20-0) = ½ (2)(20) = 20
Thaj tsam ntawm 3 = thaj tsam ntawm lub xwmfab = (6-5)(20-0) = (1)(20) = 20

Qhov deb mus ncig ntawm lub sijhawm t = 5 vib nas this mus rau t = 8 vib nas this:
10 + 20 + 20 = 50 meters
Cov lus teb yog B.

6. Kev soj ntsuam cov roj poob rau ntawm lub tsheb uas tsav tsheb ntawm txoj kev ncaj nraim yog piav qhia zoo li hauv daim duab.

Uas qhia tau tias lub tsheb tab tom txav mus nrog kev nrawm nrawm tas li yog ....
A. 1 thiab 2
B. 1 thiab 3
C. 1 thiab 4
D. 2 thiab 3
E. 2 thiab 4
Kev Sib Tham
(1) Kev nrawm tas mus li (kev nrawm zoo)
(2) Kev qeeb qeeb tas li (kev nrawm tsis zoo)
(3) Kev nrawm tas li ces qhov ceev tas li
(4) Kev nrawm nrawm tas li ces kev qeeb qeeb tas li
Cov lus teb yog lawm yog A.

7. Daim duab qhia txog qhov ceev (v) piv rau lub sijhawm (t) hauv qab no muab cov ntaub ntawv hais txog kev txav ntawm ib yam khoom.
Qhov deb uas yam khoom ntawd taug kev hauv 5 vib nas this kawg yog….
A. 100 m
B. 120 m
C. 130 m
D. 140 m
E. 150 m
Kev Sib Tham
Lo lus nug no yog qhov deb uas tau mus ncig hauv 5 vib nas this kawg.
Thaj tsam ntawm 1 = thaj tsam ntawm daim duab peb sab = ½ (6-5)(40-20) = ½ (1)(20) = 10
Thaj tsam ntawm lub dav hlau 2 = thaj tsam ntawm lub duab plaub fab = (9-5)(20-0) = (4)(20) = 80
Thaj tsam ntawm 3 = thaj tsam ntawm daim duab peb sab = ½ (10-9)(20-0) = ½ (1)(20) = 10

Qhov deb tau mus ncig thaum 5 vib nas this kawg:
10 + 80 + 10 = 100 meters
Cov lus teb yog lawm yog A.

8. Daim duab v – t ntawm lub tsheb uas txav mus los ntawm GLBB tau qhia nyob rau hauv daim duab!

Qhov kev nrawm tib yam tshwm sim hauv ...
A. A – B thiab B – C
B. A – B thiab C – D
C. B – C thiab C – D
D. C – D thiab D – E
E. D – E thiab E – F
Kev Sib Tham
Kev nrawm yog ib qho scalar quantity, thaum lub velocity yog ib qho vector quantity. Kev nrawm yeej ib txwm yog positive, thaum lub acceleration tuaj yeem yog positive lossis negative. Kev nrawm yog positive yog tias qhov velocity nce (qhov kev taw qhia ntawm velocity = qhov kev taw qhia ntawm kev nrawm), thiab kev nrawm yog negative yog tias qhov velocity txo qis (qhov kev taw qhia ntawm velocity yog qhov sib txawv ntawm qhov kev taw qhia ntawm kev nrawm).
Ib qho ntawm cov qauv GLBB:
v_t = v_o + ntawm —-> v_t -v_o = ntawm —-> ib = v_t -v_o / t
Siv cov mis no los xam qhov kev nrawm. Vim tias peb tab tom xam qhov kev nrawm, tsis yog qhov kev nrawm, tsis txhob quav ntsej lub cim tsis zoo.
Qhov ceev ntawm AB = (25 – 20) / (20 – 0) = 5 / 20 = 1/4 = 0,25 m/s²
Qhov ceev ntawm BC = (45 – 25) / (40 – 20) = 20 / 20 = 1 m/s²
Qhov ceev CD = (35 – 45) / (50 – 40) = 10 / 10 = 1 m/s²
Ceev ​​DE = (25 – 35) / (70 – 50) = 10 / 20 = 1/2 = 0,5 m/s²
Qhov ceev EF = (0 – 25) / (90 – 70) = 25 / 20 = 5/4 = 1,25 m/s²
Cov lus teb yog C.

9. Qhov ceev (v) ntawm ib yam khoom uas txav mus rau hauv ib txoj kab ncaj nraim tawm tsam lub sijhawm (t) yog raws li pom hauv daim duab v-t. Qhov deb uas yam khoom taug kev hauv 10 vib nas this yog…
A. 5 m
B. 24 m
C. 80 m
D. 250 m
E. 500 m
Kev Sib Tham
Nws paub lawm (cov ntaub ntawv raws li daim duab):
Qhov ceev pib (v_o= 0 TZS
Qhov ceev kawg (v_t) = 20 m/s
Lub sijhawm luv (t) = 4 vib nas this
Nug:
Qhov deb tau mus ncig hauv 10 vib nas this?
Lus teb:
Peb cov qauv rau kev txav mus los uas nrawm sib npaug (GLBB):
v_t = v_o + ntawm
s = v_o t + ½ ntawm²
v_t² = v_o² + 2 lub qag
Cov lus piav qhia txog mis: v_t = qhov ceev kawg, v_o = qhov ceev pib, a = kev nrawm, t = lub sijhawm luv, s = qhov deb mus ncig
Xam qhov kev nrawm (a):
v_t = v_o + ntawm
20 = 0 + ib (4)
20 = 4 ib
ib = 20 / 4
ib = 5 m/s²
Xam qhov deb uas tau mus ncig hauv 10 vib nas this:
s = v_o t + ½ ntawm²
s = (0)(10) + ½ (5)(10)²
s = ½ (5)(100)
s = (5)(50)
s = 250 meters
Cov lus teb yog D.

10. Yog tias ib yam khoom raug pov rau saum npoo av, ces daim duab qhia txog qhov loj ntawm qhov kev nrawm uas yam khoom ntawd ntsib yog...
Kev Sib Tham
Thaum ib yam khoom raug pov rau saum npoo ntawm lub ntiaj teb, qhov kev nrawm uas yam khoom ntawd ntsib yog lub ntiaj teb qhov kev nrawm ntawm lub ntiajteb txawj nqus. Lub ntiaj teb qhov kev nrawm ntawm lub ntiajteb txawj nqus yog tus nqi tas mus li ntawm 9,8 m/s2.² thiab qhov kev taw qhia ntawm lub ntiaj teb txoj kev nrawm nrawm ntawm lub ntiajteb txawj nqus yeej ib txwm nyob rau hauv nruab nrab ntawm lub ntiaj teb.
Kev nrawm nrawm tas li yog tus cwj pwm los ntawm ib txoj kab ncaj nraim sib luag rau t-axis thiab perpendicular rau a-axis.
Cov lus teb yog D.

11. Ib yam khoom txav mus los ntawm qhov ceev raws li qhia hauv daim duab hauv qab no. Qhov deb uas yam khoom taug kev hauv 20 vib nas this yog….

1. 600 m
2. 500 m
3. 200 m
4. 100 m

Kev Sib Tham
Qhov deb mus ncig thaum 0 - 10 vib nas this = thaj tsam ntawm lub xwmfab + thaj tsam ntawm daim duab peb sab
Thaj tsam ntawm lub xwmfab = (20-0)(10-0) = (20)(10) = 200 meters
Thaj tsam ntawm daim duab peb sab = (1/2)(10-0)(40-20) = (1/2)(10)(20) = (5)(20) = 100 meters
Qhov deb tau mus ncig thaum 0 - 10 vib nas this = 200 meters + 100 meters = 300 meters
 
Qhov deb mus ncig hauv 10 - 20 vib nas this = thaj tsam ntawm daim duab peb sab
Thaj tsam ntawm daim duab peb sab = (1/2)(20-10)(40-0) = (1/2)(10)(40) = (5)(40) = 200 meters

Qhov deb uas ib yam khoom taug kev thaum 0 - 20 vib nas this:
300 meters + 200 meters = 500 meters

Cov lus teb yog B.

12. Kev txav ntawm peb yam khoom, txhua yam tau piav qhia nrog daim duab hauv qab no.
Cov lus tseeb rau qhov kev txav ntawm peb yam khoom yog….
Kev Sib Tham
Daim duab kos khoom 1 = Daim duab kos Acceleration (a) thiab lub sijhawm (t)
Raws li daim duab graph, lub khoom txav mus nrog kev nrawm tas li lossis lub khoom txav mus nrog kev nrawm tas li. txav mus rau hauv kab ncaj nraim nrog kev nrawm tas liKev nrawm tas mus li yog qhia los ntawm ib txoj kab ncaj nraim uas txiav qhov axis nrawm (a).

Daim duab kos 2 = Daim duab kos ntawm qhov ceev (v) thiab lub sijhawm (a)
Raws li daim duab kos, yam khoom txav mus rau qhov ceev tas li lossis yam khoom txav mus rau hauv ib txoj kab ncaj nraim ntawm qhov ceev tas li. Qhov ceev tas li yog qhia los ntawm ib txoj kab ncaj nraim uas txiav lub axis ntawm qhov ceev (v).

Daim duab kos 3 = Daim duab kos ntawm kev hloov chaw (x) thiab lub sijhawm (a)
Raws li daim duab kos, nws zoo li tias qhov khoom txav chaw tseem nyob ruaj khov. Qhov no txhais tau tias qhov khoom tsis txav mus los lossis so. Ib yam khoom uas nyob ruaj khov yog qhia los ntawm ib txoj kab ncaj nraim uas hla lub axis txav chaw (x).

Cov lus teb yog lawm yog A.

13. Qhov chaw ntawm ib yam khoom uas txav mus raws txoj kab x yog qhia los ntawm daim duab hauv qab no.
Daim duab qhia tau hais tias yam khoom txav mus los ntawm qhov ceev tas li hauv lub sijhawm nruab nrab ntawm….

1. 5 txog 15 vib nas this thiab 25 txog 35 vib nas this
2. 0 txog 5 vib nas this thiab 35 txog 40 vib nas this
3. 15 txog 25 vib nas this
4. 0 txog 5 vib nas this, 15 txog 25 vib nas this thiab 35 txog 40 vib nas this

Kev Sib Tham
5 txog 15 vib nas this thiab 25 txog 35 vib nas this = qhov nrug ntawm cov khoom tseem ruaj khov lossis cov khoom tseem nyob
0 txog 5 vib nas this, 15 txog 25 vib nas this thiab 35 txog 40 vib nas this = qhov deb ntawm yam khoom yeej ib txwm hloov pauv tas li ntawm tib lub sijhawm lossis yam khoom txav mus los ntawm qhov ceev tas li.
Cov lus teb yog D.

Qhov chaw nug lus:

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