Kev Tshawb Fawb

Kawm cov piv txwv ntawm cov teeb meem ntawm kev cuam tshuam thiab kev diffraction ntawm lub teeb - diffraction grating , tom qab ntawd ua haujlwm rau cov teeb meem ntawm kev cuam tshuam thiab kev diffraction ntawm lub teeb.

1. Muaj ib daim ntaub thaiv qhov muag uas muaj 4000 kab txhua 1 cm uas nyob deb li 1 'meter' ntawm qhov uas ci ntsa iab. Xam qhov ntev ntawm lub teeb yog tias daim duab siab tshaj plaws thawj zaug yog 30 cm ntawm qhov uas ci ntsa iab.
Kev Sib Tham
Nws paub tias:
d = 1 / (4000 kab / cm) = 0,00025 cm = 2,5 x 10^-4 cm = 2,5 x 10^-6 m
l = 1 m
y = 30 cm = 0,3 m
Xav paub ntxiv: wavelength (lambda)

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4 Piv txwv ntawm qhov nruab nrab ntawm qhov ceev thiab qhov nruab nrab ntawm qhov ceev

1. Ib lub tsheb khiav ncaj nraim mus rau sab hnub tuaj li 100 meters hauv 4 vib nas this thiab tom qab ntawd khiav ncaj nraim mus rau sab hnub poob li 50 meters hauv 1 vib nas this. Txheeb xyuas seb qhov ceev nruab nrab dan qhov ceev nruab nrab txawb tau.
Kev Sib Tham

Qhov Nrug = 100 meters + 50 meters = 150 meters
Qhov ntau ntawm kev hloov chaw = 100 meters - 50 meters = 50 meters thiab qhov kev hloov chaw yog mus rau sab hnub tuaj.
Tag nrho lub sijhawm = 4 vib nas this + 1 vib nas this = 5 vib nas this.

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4 Piv txwv ntawm cov lus nug txog qhov deb thiab kev hloov chaw

1. Ib lub tsheb txav mus ncaj nraim rau sab hnub tuaj li 100 meters thiab tom qab ntawd txav mus ncaj nraim rau sab hnub poob li 50 meters. Txheeb xyuas qhov deb thiab kev hloov chaw ntawm lub tsheb los ntawm nws qhov chaw pib.
Kev Sib Tham
Qhov Nrug = 100 meters + 50 meters = 150 meters
Qhov ntau ntawm kev hloov chaw = 100 meters - 50 meters = 50 meters thiab qhov kev hloov chaw yog mus rau sab hnub tuaj.

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10 Piv txwv ntawm kev txav mus los uas nrawm sib npaug

1. Thaum xub thawj lub tsheb nres. Tom qab 10 vib nas this, lub tsheb qhov ceev nce mus txog 20 m/s. Txheeb xyuas seb lub tsheb qhov kev nrawm npaum li cas!
Kev Sib Tham
Tsis muaj tus qauv (siv logic) :
Lub tsheb qhov ceev hloov mus rau 20 m/s tom qab 10 vib nas this. Qhov no txhais tau tias lub tsheb qhov ceev nce 2 m/s txhua ob vib nas this. Yog li, lub tsheb qhov kev nrawm yog 2 m/s ib ob = 2 m/s ib ob = 2 m/s².
Siv cov mis :
Nws paub tias:
Qhov ceev pib (v_o) = 0 (lub tsheb nres twj ywm)

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7 Piv txwv ntawm Cov Teeb Meem Kev Tawm Tsam Linear

1. Lub tsheb kauj vab txav mus rau hauv ib txoj kab ncaj nraim nrog qhov ceev tas li ntawm 10 m/s. Txheeb xyuas qhov deb uas lub tsheb kauj vab tau mus tom qab 10 vib nas this thiab 60 vib nas this.

Kev Sib Tham
Qhov ceev tas mus li = 10 m/s lossis 10 meters ib ob txhais tau tias lub maus taus txav mus 10 meters txhua 1 vib nas this.
Tom qab 2 vib nas this, lub maus taus txav mus 20 meters,
Tom qab 5 vib nas this, lub maus taus txav mus 50 meters,
Tom qab 10 vib nas this, lub maus taus txav mus 100 meters.,
Tom qab 60 vib nas this, lub maus taus txav mus 600 meters..

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19 Piv Txwv ntawm Cov Lus Nug Txog Kev Tawm Tsam Ncaj Ncees

1. Saib daim duab qhia txog qhov ceev (v) piv rau lub sijhawm (t) ntawm ib yam khoom uas txav mus rau hauv ib txoj kab ncaj. Qhov loj ntawm qhov qeeb uas yam khoom ntawd ntsib yog….
A. 2,5 ms^-2
B. 3,5 ms^-2
C. 4,0 ms^-2
D. 5,0 ms^-2
E. 6,0 ms^-2
Kev Sib Tham

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3 Piv txwv ntawm Kepler txoj cai

1. Qhov nruab nrab ntawm lub ntiaj teb mus rau lub hnub yog 149,6 x 10⁶ km thiab lub sijhawm tig lub ntiaj teb yog 1 xyoos. Qhov sib piv tas mus li ntawm lub square ntawm lub sijhawm rau lub cube ntawm qhov nruab nrab ntawm lub ntiaj teb mus rau lub hnub yog dab tsi?
Kev Sib Tham

Lo lus nug no muaj feem cuam tshuam nrog Kepler txoj cai lij choj.
Nws paub tias:
T = 1 xyoo, r = 149,6 x 10⁶ km
Nug: T² / r ib³ = ... ?
Lus teb:

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4 Piv txwv ntawm Cov Teeb Meem Gravitational Acceleration

1. Qhov kev nrawm ntawm lub ntiajteb txawj nqus ntawm lub hli loj npaum li cas? Qhov hnyav ntawm lub hli = 7,35 x 10²² kg, lub vojvoog ntawm lub hli = 1.740.000 meters, lub ntiajteb txawj nqus tas mus li (G) = 6,67 x 10^-11 N m² /kg²
Kev Sib Tham
Newton txoj cai thib ob cov qauv:

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3 Piv txwv ntawm Newton Txoj Cai ntawm Lub ntiajteb txawj nqus

1. Lub zog gravitational ntawm ib tug tub ntxhais kawm ntawv hnyav 40 kg thiab ib tug tub ntxhais kawm ntawv poj niam hnyav 30 kg uas nyob deb li 2 meters, loj npaum li cas? Lub zog gravitational constant = 6,67 x 10 ^-11 N ^m2 / ^kg2

Kev Sib Tham

Lo lus nug no muaj feem cuam tshuam nrog Newton txoj cai ntawm lub ntiajteb txawj nqus
Nws paub tias:
m₁ = 40 kg, m₂ = 30 kg, r = 2 m, G = 6,67 x 10^-11 N m² /kg²
Lus Nug: Lub zog gravitational (F) loj npaum li cas?

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