Lub ntsiab lus ntawm kev sim: Kev sim Melde
Lub hom phiaj ntawm kev sim: Tshawb nrhiav kev sib raug zoo ntawm txoj hlua khi, qhov ntev ntawm lub zog thiab qhov ceev ntawm nthwv dej.
Cov cuab yeej thiab cov khoom siv: Lub sijhawm ntaus cim, hlua, lub pulley, qhov hnyav 50 gram, lub zog fais fab, nplai, thiab tus kav.
Lub tswv yim yooj yim:
Qhov ceev ntawm nthwv dej kis tau los ntawm kab zauv:
v = λ f
Cov Ntaub Ntawv:
v = qhov ceev ntawm nthwv dej
λ = wavelength
f = zaus
Cov nthwv dej uas kis mus rau ntawm cov hlua lossis cov hlua khi yog cov nthwv dej transverse . Qhov ceev ntawm cov nthwv dej transverse ntawm ib txoj hlua tuaj yeem suav tau siv cov mis:
Cov Ntaub Ntawv:
v = qhov ceev ntawm nthwv dej ntawm txoj hlua (meters/second)
F = T = lub zog nruj ntawm txoj hlua (Newton)
μ = qhov hnyav ib chav ntev ntawm txoj hlua (kilogram/meter)
Cov Kauj Ruam Sim:
1. Ntsuas qhov hnyav ntawm txoj hlua siv lub nplai
Qhov hnyav ntawm txoj hlua = ……….gram = ……….kg
2. Siv tus pas ntsuas qhov ntev ntawm txoj hlua.
Qhov ntev ntawm hlua (l) =……….cm =……….m
3. Xam qhov hnyav ntawm txoj hlua
μ = m / l = ……….kg/m
Sau rau hauv lub rooj ntaub ntawv, kem ceev ntawm cov hlua, thawj kab.
4. Muab cov khoom siv sim sib dhos ua ke raws li pom hauv daim duab. Ib kawg ntawm txoj hlua khi rau ntawm 50 gram load.
5. Ntsuas qhov ntev ntawm txoj hlua ntawm ib sab khi mus rau lwm sab khi.
Qhov ntev ntawm txoj hlua (l) = ……….cm = ……….m
6. Qhib lub ticker timer kom txog thaum muaj nthwv dej sawv ntawm txoj hlua. Suav tus naj npawb ntawm cov nthwv dej tiv thaiv. Tus naj npawb ntawm cov nthwv dej tiv thaiv = …………
Xav tias muaj n lub plab, ces qhov deb ntawm 1 lub plab = qhov ntev ntawm txoj hlua (l) / n = x
Qhov Nrug Deb 1 lub plab (x) = 1/2 qhov ntev ntawm lub plab (1/2 λ)
1 qhov ntev ntawm lub teeb (λ) = 2 x =……….. m
Sau rau hauv lub rooj ntaub ntawv, kem wavelength, kab thawj zaug.
7. Zaus ntawm nthwv dej = lub sijhawm co ntawm lub sijhawm ticker = Zaus ntawm PLN = 50 Hertz
8. Xam qhov ceev ntawm nthwv dej
v = f λ =………..m/s
Sau rau hauv lub rooj ntaub ntawv, kem ceev ntawm nthwv dej, kab thawj zaug.
9. Rov ua kauj ruam 4, siv qhov hnyav 100 gram.
Sau cov ntaub ntawv rau hauv lub rooj, kab thib ob.
10. Rov ua kauj ruam 4, siv qhov hnyav 150 gram.
Sau cov ntaub ntawv rau hauv lub rooj, kab thib peb.
Cov ntaub ntawv:
Qhov hnyav ntawm lub thawv (m) = 50 grams = (50/1000) kg = (5/100) kg = 0,05 kg
Kev nrawm vim lub ntiajteb txawj nqus (g) = 10 m/s 2
Qhov hnyav thauj khoom (w) = mg = (0,05 kg) (10 m/s 2 ) = 0,5 kg m/s 2 = 0,5 N
Qhov hnyav ntawm lub nra (w) = lub zog nruj hauv txoj hlua (F)
|
Tsis yog |
Lub zog ntawm txoj hlua (F) |
Zaus (f) |
Qhov ntev ntawm lub zog ( λ) |
Qhov ceev ntawm cov hlua ( μ) |
Qhov ceev ntawm nthwv dej (v = f λ ) |
|
1 |
0,5 N |
50 Hz |
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|
2 |
1,0 N |
50 Hz |
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|
3 |
1,5 N |
50 Hz |
Kev tshuaj xyuas cov ntaub ntawv:
- Kev sib raug zoo ntawm qhov nro hauv txoj hlua thiab qhov wavelength yog dab tsi?
- Qhov kev sib raug zoo ntawm qhov nro hauv txoj hlua thiab qhov ceev ntawm nthwv dej kis mus rau lwm qhov yog dab tsi?
- Qhov sib raug zoo ntawm wavelength thiab qhov ceev ntawm nthwv dej yog dab tsi?
Xaus lus:
Hais koj qhov xaus lus.
