Lisebelisoa tsa Matla a Kinetic ho Motsamao oa Potoloho
Lintho tse tsamaeang moleng o otlolohileng li na le matla a kinetic e ka baloang ho sebelisoa foromo:
EK = ½ mv2
Lintlha :
EK = matla a kinetic (diyuniti tsa machabeng ke kg m2/s2 kapa Joule)
m = boima (yuniti ea machaba ke kilogram, e khutsufalitsoeng kg)
v = lebelo (yuniti ea machaba ke mithara/motsotsoana, e khutsufalitsoeng ke m/s)
Palo ea 'mele motsamaong oa ho potoloha e tšoana le boima (m) ho ea pele motsamao o otlolohileng ke motsotso oa ho se inertia (Ke)Palo ea 'mele motsamaong oa ho potoloha e tšoana le lebelo (v) motsamaong oa ho potoloha ke lebelo la angularKahoo, ntho e potolohang e na le matla a kinetic a ka baloang ho sebelisoa foromo:
Mohlala oa mathata
1. Karoloana e na le motsotso oa inertia oa 2 kg m2 e potoloha ka lebelo le potolohang la 10 rad/s. Fumana matla a kinetic a karoloana!
Puisano
2. Karoloana e boima ba 1 kg e bohōle ba limithara tse 2 ho tloha mothating oa potoloho, e potoloha ka lebelo le chitja la 4 rad/s. Fumana matla a kinetic a karoloana!
Puisano
Hoa tsebahala :
Boima ba karoloana (m) = 1 kg
Sebaka sa karoloana ho ea ho axis ea potoloho (r) = limithara tse 2
Lebelo la Angular la karoloana = 4 rad/s
E botsitsoe : Matla a kinetic (EK) a karoloana ke eng ha e potoloha?
Jawab :
3. Silindara e tiileng (I = ½ m R 2 ) e nang le boima ba 8 kg e phutholohang ntle le ho thella holim'a sebaka se bataletseng ka lebelo la 15 m/s. Matla ohle a kinetic a silindara ke…
Puisano
Hoa tsebahala:
Motsotso oa ho se sebetse hantle ha silindara e tiileng (I) = ½ MR 2
Boima ba silindara e tiileng (m) = 8 kg
Lebelo la silindara (v) = 15 m/s
E botsitsoe: Matla ohle a kinetic a silindara
Karabo:
Matla a kinetic a phetolelo:
EK = ½ mv 2 = ½ (8) (15 2 ) = (4) (225) = 900 Joules
Matla a kinetic a potolohang:
EK = ½ I ω2 = ½ (½ m R2)(v/R)2 = (¼ m R2)(v2/R2) = ¼ mv2 = ¼ (8)(152) = (2)(225) = 450 Joule
Matla a kinetic kaofela:
Li-Joule tse 900 + Li-Joule tse 450 = Li-Joule tse 1350
