1. Li-pendulum tse peli tse bonolo li libakeng tse peli tse fapaneng. Bolelele ba pendulum ea bobeli ke bolelele ba pendulum ea pele ka makhetlo a 0.4, 'me ho potlaka ha matla a khoheli ho bonoang ke pendulum ea bobeli ke makhetlo a 0.9 ho feta ho potlaka ha matla a khoheli ho bonoang ke pendulum ea pele. Fumana papiso ea makhetlo a pendulum ea pele le pendulum ea bobeli.
A. 2/3
B. 3/2
C. 4/9
D. 9/4
Tse tsejoang:
Bolelele ba thapo ea pendulum ea pele (l 1 ) = 1
Bolelele ba thapo ea pendulum ea bobeli (l 2 ) = 0.4 (l 1 ) = 0.4 (1) = 0.4
Ho potlaka ka lebaka la matla a pendulum ea pele (g 1 ) = 1
Ho potlaka ka lebaka la matla a khoheli a pendulum ea bobeli (g 2 ) = 0.9 (1) = 0.9
Ho batlwa: Papiso ya maqhubu a pendulum ya pele (f 1 ) le pendulum ya bobedi (f 2 )
Tharollo:
Papiso ea makhetlo a pendulum ea pele (f 1 ) le pendulum ea bobeli (f 2 ):
Karabo e nepahetseng ke A.
2. Ntho e leketlile pheletsong e 'ngoe ea thapo ebe e etsa motsamao o bonolo oa harmonic ka maqhubu a 0.5 Hertz. Haeba bolelele ba thapo bo eketsoa ka makhetlo a mane ho feta bolelele ba pele, joale fumana nako ea motsamao oa harmonic.
A. Metsotsoana e ¼
B. ½ motsotsoana
C. metsotsoana e 2
D. Metsotsoana e 4
Tse tsejoang:
Khafetsa ea pendulum (f) = 0.5 Hz
Ho batloa: Fumana nako (T) ea pendulum haeba bolelele ba thapo (l) bo feta bolelele ba pele ka makhetlo a mane.
Tharollo:
Nako ea pendulum ea pele:
Bolelele ba pele ba thapo:
Haeba bolelele ba thapo bo eketsehile ka makhetlo a mane ho feta bolelele ba pele:
Ebe nako ea pendulum ke:
Nako ea motsamao ke metsotsoana e 4.
Karabo e nepahetseng ke D.
3. Li-pendulum tse peli tse bolelele bo lekanang ba thapo ea tsona, empa boima ba pendulum ea bobeli bo feta boima ba pendulum ea pele ka makhetlo a mane. Haeba f 1 e le makhetlo a pendulum ea pele 'me f 2 e le makhetlo a pendulum ea bobeli, joale fumana kamano pakeng tsa f 1 le f 2.
A. f 1 = f 2
B. f 1 = 2 f 2
C. f 2 = 2 f 1
D. f 1 = 4 f 2
Tharollo:
Tekanyo ea makhetlo a pendulum e bonolo:
f = maqhubu, g = ho potlaka ka lebaka la matla a khoheli, l = bolelele ba thapo
Ho latela equation e kaholimo, re ka fihlela qeto ea hore boima ha bo ame maqhubu a pendulum e bonolo.
Karabo e nepahetseng ke A.
4. Bongata bo ka tlase bo sa ameng nako ea pendulum e bonolo ke…..
A. bolelele ba thapo le boima ba ntho eo
B. bolelele ba thapo le ho potlaka ka lebaka la matla a khoheli
C. boima ba ntho le sekhutlo sa pele
D. bolelele ba thapo le sekhutlo sa pele
Tharollo:
Tekanyo ea nako ea pendulum e bonolo:
T = nako, g = ho potlaka ka lebaka la matla a khoheli, l = bolelele ba thapo
Ho latela foromo e ka holimo, ho ka fihlelleha qeto ea hore bolelele ba molamu (l) le ho potlaka ha matla a khoheli (g) li ama nako ea pendulum e bonolo . Ho seng joalo, boima ba ntho le sekhutlo sa pele ha li ame nako ea pendulum e bonolo m.
Karabo e nepahetseng ke C.
5. Thapo ea pendulum e bonolo e entsoe ka nylon. Qetellong e 'ngoe ea thapo ho leketlile boima ba ligrama tse 10 'me bolelele ba thapo ke mithara e le 1. Haeba maqhubu a hlahisoang a imenne habeli makhetlo a pele, joale bolelele ba thapo bo tlameha ho fetoloa ho…
A. 0.25 limithara
B. limithara tse 0.50
C. limithara tse 2.0
D. limithara tse 4.0
Tse tsejoang:
Boima ha bo ame maqhubu a pendulum e bonolo.
Bolelele ba thapo ea pendulum e bonolo (l) = 1 meter
Ho batloa: fumana bolelele ba thapo haeba maqhubu a imenne habeli ho feta maqhubu a pele
Tharollo:
Maqhubu a pele a pendulum e bonolo:
Maqhubu a pendulum e bonolo a habeli ho feta maqhubu a pele:
Hore maqhubu a ho qetela a imenne habeli, bolelele ba pendulum bo lokela ho fetoloa ho ba limithara tse 0.25.
Karabo e nepahetseng ke A.
