Lihlooho tsa fisiks tse buang ka liketsahalo tsa tlhaho jj. tse amanang le fisiks.
1. Kulo e boima ba digrama tse 30 e tsamayang ka lebelo la 30 m/s e otla boloko ba lepolanka bo boima ba 1 kg bo phomotseng. Fumana lebelo la boloko haeba kulo e kentswe bolokong!
Puisano
Hoa tsebahala :
Boima ba kulo (m1) = digrama tse 30 = 0,03 kg
Boima ba boloko (m2) = 1 kg
Lebelo la pele la kulo (v)1) = 30 m/s
Lebelo la pele la boloko (v2) = 0 (boloko e sa sisinyeheng)
E botsitsoe : lebelo la kulo le thibelo kamora ho thulana (v')
Mehlala e 3 ea ho thulana ho sa tenyetseheng ka karolo e itseng
1. Ntho ea boima ba ligrama tse 500 e tsamaea ka lebelo la 10 m/s 'me ntho ea boima ba ligrama tse 200 e tsamaea ka lebelo la 12 m/s. Lintho tsena tse peli lia atamelana 'me lia thulana. Haeba ka mor'a ho thulana, lebelo la ntho ea boima ba ligrama tse 500 ke 6 m/s, joale lebelo la ntho ea boima ba ligrama tse 200 ke…
Puisano
Hoa tsebahala :
Boima ba ntho 1 (m1) = digrama tse 500 = 0,5 kg
Boima ba ntho 2 (m2) = digrama tse 200 = 0,2 kg
Lebelo la pele la ntho 1 (v)1) = -10 m/s
Lebelo la pele la ntho 2 (v)2) = 12 m/s
Lebelo la ho qetela la ntho 1 (v)1') = 6 m/s
Mehlala e 8 ea Lipotso tsa Linear Momentum
1. Ntho e boima ba 1 kg e tsamaya ka lebelo la 10 m/s. Momentum ntho ke…
Puisano
Hoa tsebahala :
Boima (m) = 1 kg
Lebelo (v) = 10 m/s
E botsitsoe : lebelo le otlolohileng (p)
Jawab :
Foromo ea lebelo: p = mv
Tlhaloso: p = momentum, m = boima, v = kecepatan.
Motsamao oa ntho ke:
p = mv = (1)(10) = 10 kg m/s2
Mehlala e 11 ea Lipotso tsa Momentum le Impulse
1. Bolo e boima ba 0,2 kg e lahlelwa ka ho rapama ka lebelo la 10 m/s mme e thula lebota, ebe bolo e kgutlela morao ka lebelo le tshwanang. Phetoho motsamaong wa bolo ke...
Puisano
Mehlala e 16 ea Lipotso Mabapi le Molao oa Paballo ea Matla a Mekaniki
Molao oa paballo ea matla a mechini motsamaong oa ho oa ka bolokolohi
1. Kokonate e boima ba 2 kg e oa ka bolokolohi ho tloha bophahamong ba limithara tse 6. Matla a kinetic a kokonate ha e fihla fatše ke… g = 10 m/s2
Puisano
Hoa tsebahala :
Boima ba kokonate (m) = 2 kg
Bophahamo (h) = limithara tse 6
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
E botsitsoe : matla a kinetic (EK)
2 Mehlala ea lipotso tsa matla
Matla ke sekhahla seo mosebetsi o etsoang ka sona khoebo kapa boiteko bo entsoeng nakong e itseng ea nako.
Ka metametrically, matla ke karolelano ea boiteko le nako.
P = W / t
Tlhaloso: P = matla (yuniti Joule/motsotswana), W = mosebetsi (Joule) le t = nako e sa fellang (motsotswana)
Ho latela equation ena, ho ka fihlellwa qeto ya hore ha sekgahla seo mosebetsi o etswang ka sona se le seholo, matla a ba maholo, ka lehlakoreng le leng, sekgahla seo mosebetsi o etswang ka sona se senyenyane, matla a ba manyane.
Matla ke bongata bo boholo. Sistimi ea machaba ea li-unit tsa matla ke joule/bobeli. Joule/bobeli = watt (e khutsufalitsoeng W), e reheletsoeng ho tlotla James Watt.
Sistimi ea Brithani ea liyuniti tsa matla ke matla a ponto-foot ka motsotsoana. Yuniti ena e nyane haholo bakeng sa merero e sebetsang, kahoo yuniti e kholoanyane, matla a lipere (e khutsufalitsoeng hp), e sebelisoa. Matla a lipere a le mong = matla a lipere a 550 ka motsotsoana = 764 watts = ¾ kilowatt.
1. Seliba se fuoa mojaro oa 2 kg ebe se fanyehoa ka ho otloloha holim'a sethala. Haeba seliba se lelefala ka 4 cm, joale phetoho ho matla a ka bang teng Matla a thellang a selemo ke… g = 10 m/s2
Puisano
Hoa tsebahala :
Boima ba mojaro (m) = 2 kg
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
Boima ba mojaro (w) = mg = (2)(10) = 20 Newton
Keketseho ea bolelele ba selemo (x) = 4 cm = 0,04 metres
E botsitsoe : Matla a kgonego a rabara a selemo
1. Ntho e boima ba 1 kg e oela ka bolokolohi ho tloha bophahamong ba limithara tse 10 ho fihlela e fihla fatše. Fumana:
(a) Mosebetsi o entsoeng ke matla a khoheli holim'a ntho eo
(b) Liphetoho matla a ka bang teng matla a khoheli
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
Puisano
Hoa tsebahala :
Boima ba ntho (m) = 1 kg
Bophahamo (h) = limithara tse 10
Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s2
Karabo:
(a) Mosebetsi o etsoang ka matla a khoheli
Ha ntho e wela ka bolokolohi, tataiso ya motsamao wa ntho e ya tlase mme tataiso ya matla a kgohedi a sebetsang hodima ntho (boima ba ntho) le yona e ya tlase. Hobane a le ka lehlakoreng le le leng, matla a kgohedi a tsamaellana kapa a etsa sekhutlo sa 0o ka tataiso ea motsamao oa ntho. Cos 0 = 1 'me nomoro e' ngoe le e 'ngoe e atisitsoeng ka 1 e tšoana le nomoro eo, kahoo cos 0 ha e hloke ho kenyelletsoa foromong ea mosebetsi.
Foromo ea mosebetsi ke W = F s, moo W = mosebetsi, F = matla le s = ho falla. Haeba e fetotsoe ho latela bothata bona, foromo ea mosebetsi e fetoha ho W = wh = mgh, moo W = mosebetsi, w = matla a khoheli, h = phetoho bophahamong ba ntho, m = boima ba ntho, g = ho potlaka ka lebaka la matla a khoheli.
Kahoo mosebetsi o etsoang ke matla a khoheli ke:
W = wh = mgh = (1)(10)(10) = 100 Joule
Mehlala e 'meli ea ho sebelisa melao ea Newton tsamaisong ea ho jara thapo le pulley
1. Boima ba boloko ba 1 ke 2 kg, boima ba boloko ba 2 ke 3 kg, lebelo le bakoang ke matla a khoheli ke 10 m/s2Fumana (a) boholo le tataiso ea ho potlaka ha sistimi (b) boholo ba matla a khatello thapong!
Puisano
Mehlala e 4 ea lipotso mabapi le tšebeliso ea melao ea Newton motsamaong o otlolohileng oa lifti kapa lifti
1. Motho ea boima ba 50 kg o ka har'a lifti. Ho potlaka ka lebaka la matla a khoheli = 10 m/s2Fumana boholo ba matla a tloaelehileng a sebelisoang ke mokatong oa lifti ho motho haeba:
(a) lifti e sa bueng
(b) lifti e theohela tlase ka lebelo le sa fetoheng
(c) lifti e nyolohela holimo ka lebelo la 5 m/s2
(d) lifti e theohela tlase ka lebelo la 5 m/s2
(e) lifti ea ho oa mahala