Univeristatea Tehnica a Moldovei, Catedra Fizica
la experiena de laborator Nr. 10.9Studiul amortizarii oscilatiilor mecanice
A efectuat studentul grupei:FAF-141
Numele i prenumele student(ului/ei):Botnari Nicolae
A verificat profesorul:Tronciu Vasile
2015
1. Scopul experienei:
Studiul experimental al amortizarii oscilatiilor mecanice si determinarea
coeficientului de amortizare, decrementului logaritmic al amortizarii,
factorului de calitate a sistemului oscilant, coeficientului de rezistenta
si constantei de elastice a resortului
2. Aparate i accesorii:
Calculator, soft pentru procesarea datelor experimentale, cablu COM,
cronometru electronic, 1 senzor, stativ, mufe, bara scurta, cilindru
cu orificiu axial ce trece in oblic, bulon cu orificiu axial, pendul gravitational,
rigla, carucior, cu obturator si indicator, set de resorturi comprimabile
si extensibile
3. Dependena studiat:
4. Schema experienei:
5. Tabelul msurrilor:
m=0.00600kg;
n, s, s, s, s
10.079900.396800.079900.46620
20.080100.396700.080100.46630
30.080600.395200.080900.46670
40.081000.393800.081400.46650
50.081700.393200.081700.46630
60.081800.392800.082200.46610
70.082100.392500.082700.46550
80.082800.392600.082900.46470
90.083300.392200.083700.46390
100.083800.390800.084000.464300.08420
n
, s, s
11,02291,02290,0025
21,023452,046350,00872
31,02363,069950,01367
41,023054,0930,02228
51,022955,115950,0235
61,023056,1390,02716
71,023157,162150,03565
81,023258,18540,04167
91,023359,208750,04766
101,023110,231850,05242
13,4843233,454280,535720,00541,86663581,775930,004580,00023
23,9062538,103610,505960,005061,97642620,867590,004980,00012
32,5839825,210880,622090,006221,60748505,078780,005670,00016
43,1545730,834350,563030,005621,77611559,001780,004130,00024
53,9840638,711230,5010,005021,99601625,814740,004960,00024
64,8543747,218840,453870,004542,20326691,980180,005250,00139
73,86137,720210,508920,005081,96494618,423230,005240,00034
l, m
10,2871,08631
20,2561,01788
30,3871,25137
40,3171,13152
50,2511,00986
60,2060,91437
70,2591,02304
6. Prelucrarea datelor experimentale:
9.73427;
0.0600
-0.000007;
0.0590
-1.218799;
0.0049701/s;
7. Calculul erorilor:0.015780;
0.001621;
0.005770
0.096167;
0.000063;
0.005690
0.096441;
7.454082;
0.000391/s;
0.078471;
8. Rezultate finale:( 9.730.01 );
0.2%;
( 0.0600.006 )
10%;
( 0.0590.006 )
10%;
( 0.00490.0004 )1/s;
8%.
9. Concluzii:Concluzie: Aceasta experienta ne-a permis sa masuram indirect acceleratia gravitationala construind dupa punctele experimentale graficul dependentei liniare de forma
Obtinind valoare de 9.730.01 si comparind cu valoarea deja cunoscuta constituie o confirmare a valorilor determinate ale coeficientului de rezistenta si in acelasi timp experienta demonstreaza ca valoarea coeficientului de armotizare a oscilatiilor a pendulului grafitational este de ordinul 0,005
10. Graficele dependenelor studiate:
Fig.1
Fig.2
Fig.3
Fig.4
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