Mehlala e 4 ea Lipotso tse Bonolo tsa Pendulum Pendulum e Bonolo
1. Pendulum e bonolo e na le khoele e bolelele ba 40 cm mme boima ba digrama tse 100 bo leketlile pheletsong e ka tlase ya khoele. Haeba lebelo le bakwang ke matla a khoheli e le 10 m/s2 Kahoo nako le makhetlo a pendulum e bonolo ke...
Puisano
Hoa tsebahala :
Bolelele ba thapo (l) = 40 cm = 0,4 metres
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
E botsitsoe : Nako (T) le makhetlo (f)
Jawab :
Foromo e bonolo ea nako ea pendulum :
Tlhaloso: T = nako, l = bolelele ba thapo, g = ho potlaka ka lebaka la matla a khoheli
Nako ea pendulum e bonolo :
Maqhubu a bonolo a pendulum :
Mokhoa oa 1:
f = 1/T = 1/1,256 = 0,8 Hertz
Mokhoa oa 2:
2. Bala bolelele ba thapo oacheng ea pendulum e otlang hanngoe ka motsotsoana.
Puisano
Hoa tsebahala :
Nako (T) = metsotsoana e 1
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
E botsitsoe Bolelele ba terata (l)
Jawab :
Foromo ea nako ea khoele :
Bolelele ba khoele :
3. Pendulum e bonolo e na le khoele ea 50 cm le boima ba ligrama tse 50. Ntlha e phahameng ka ho fetisisa ea boima ke 10 cm ka holimo ho ntlha e tlase ka ho fetisisa. Haeba lebelo le bakoang ke matla a khoheli e le 10 m/s2, fumana (a) nako le makgetlo a pendulum (b) lebelo la mojaro ntlheng e tlase ka ho fetisisa.
Puisano
Hoa tsebahala :
Bolelele ba thapo (l) = 90 cm = 0,9 metres
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
Phetoho bophahamong (h) = 20 cm = 0,2 metres
E botsitsoe : (a) T le f (b) v
Jawab :
(A) Nako (T) le makhetlo (f) a pendulum e bonolo
nako
Makgetlo:
f = 1/T = 1/1,884 = 0,53 Hertz.
(B) Lebelo (v) la mojaro ntlheng ea lona e tlase ka ho fetisisa
Potso ena e amana le molao oa paballo ea matla a mechini.
Ntlheng ea eona e phahameng ka ho fetisisa, mojaro o na le matla a khoheli a phahameng ka ho fetisisa 'me ha o na matla a kinetic hobane o ema ka motsotsoana ha o fetola tsela. Ha mojaro o qala ho theohela tlase, matla a khoheli a fetoloa matla a kinetic. Ntlheng ea eona e tlase ka ho fetisisa, matla 'ohle a khoheli a fetoloa matla a kinetic. Ka hona, ntlheng ea eona e tlase ka ho fetisisa, matla a kinetic a mojaro a holimo ka ho fetisisa 'me matla a eona a khoheli ke lefela.
Matla a pele a mechini = matla a khoheli a ka bang teng = mgh
Matla a ho qetela a mechini = matla a kinetic = ½ mv2
Molao oa paballo ea matla a mechini :
Matla a pele a mechini = matla a ho qetela a mechini
Matla a khoheli a ka bang teng = matla a kinetic
mgh = ½ mv2
2 gh = v2
(2)(10)(0,2) = v2
4 = v2
v = 2 m/s
4. Oache ea lebota holim'a Lefatše e sebetsa ka ho sebelisa motsamao oa pendulum e ntseng e thekesela. Haeba oache e ne e jaroa ka seteisheneng sa sepakapaka 'me e le hole le lintho tsa sepakapaka, joale...
A. matsoho a oache a tsamaea kapele
B. matsoho a oache ha a sisinyehe
C. Oache e sebetsa ka nepo haholoanyane
D. pendulum e thekesela butle haholo
E. pendulum e thekesela ka maqhubu a tlase
Puisano
Holim'a lefatše, pendulum e ka sisinyeha ka lebaka la boteng ba matla a khoheli Lefatše le sebetsa holim'a pendulum. Ka lehlakoreng le leng, sepakapakeng se ka ntle, matla a khoheli a hlahang a haufi le lefela, kahoo matsoho a oache ha a sisinyehe.
Karabo e nepahetseng ke B.
