1. Ibhola, elinamathiselwe ekugcineni kwentambo evundlile, lizungeza ngendilinga yerediyasi engama-20 cm. Ibhola lizungeze ama-360 o ngomzuzwana ngamunye. Thola ubukhulu bokusheshisa kwe-centripetal!
Kwaziwa:
Isivinini se-angular (ω ) = 360 o /isekhondi = 1 revolution/isekhondi = 6.28 radians/isekhondi
Irediyasi (r) = 20 cm = 0.2 m
Okufunwayo: Ukusheshisa kwe-Centripetal (a r )
Isixazululo:
a r = v 2 / r —> v = r ω
a r = (r ω) 2 / r = r 2 ω 2 / r
a r = r ω 2
a s = ukusheshisa okuphakathi nendawo, v = ijubane eliqondile, r = irediyasi, ω = ijubane le-angular
Ubukhulu bokusheshisa kwe-centripetal :
a r = r ω 2 a r = (0,2 m)( 6.28 rad/s)
a r = 1.256 m/s 2
2. Isondo elingamasentimitha angu-30 lijikeleza ngesivinini esingu-180 rpm. Thola ukusheshisa okuphakathi kwephuzu eliseceleni kwesondo!
Kwaziwa:
Irediyasi (r) = 30 cm = 0.3 m
Isivinini se-angular ( ω ) = imijikelezo engu-180 / imizuzwana engu-60 = imijikelezo emi-3 / isekhondi = (3)(ama-radian angu-6.28) / isekhondi = ama-radian angu-18.84/isekhondi
Okufunwayo: ukusheshisa okuphakathi ( a r ) kwe-r = 0.3 m
Isixazululo:
Ubukhulu bokusheshisa kwe-centripetal:
a r = r ω 2
a r = (0.3 m)(18.84 rad/s)
a r = 5.65 m/s 2
3. Imoto yomjaho ihamba endleleni eyindilinga engamamitha angama-50. Uma ijubane lemoto lingamakhilomitha angama-72 ngehora, nquma ubukhulu bokusheshisa kwe-centripetal!
Kwaziwa:
Irediyasi (r) = amamitha angu-50
Isivinini (v) = 72 km/h = (72)(amamitha ayi-1000) / imizuzwana engu-3600 = amamitha angu-20/sekondi
Okufunwayo : ubukhulu bokusheshisa kwe-centripetal (a r )
Isixazululo:
a r = v 2 / r = 20 2 / 50 = 400 / 50 = 8 m/s 2
4. Imoto inesivinini esiphezulu se-centripetal esingu-10 m/s 2 , ngakho-ke imoto ingajika ngaphandle kokushelela endleleni egobile. Uma imoto ihamba ngesivinini esingaguquki esingu-108 km/h, iyini i-radius yejika elingenayo i-banked?
Kwaziwa:
Ukusheshisa kwe-centripetal (a r ) = 10 m/s 2
Isivinini semoto (v) = 108 km/ h = (108)(1000) / 3600 = 30 amamitha s /se c on d
Okufunwayo: irediyasi (r)
Isixazululo:
r = v 2 / a r
r = 30 2 / 10 = 900 / 10 = 90 amamitha s
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- Ukuguqula izinkinga zesampula zamayunithi e-engeli ngezixazululo
- Izinkinga zesampula zokufuduka kwe-angular kanye nokufuduka okuqondile kanye nezixazululo
- Izinkinga zesampula yejubane eliyindilinga kanye nesivinini esiqondile ngezixazululo
- Izinkinga zesampula zokusheshisa eziqondile kanye nokusheshisa okuqondile ngezixazululo
- Isampula yezinkinga zesampula yokunyakaza okujikelezayo okufanayo ngezixazululo
- Izinkinga zesampula yokusheshisa ye-Centripetal ngezixazululo
- Isampula yezinkinga zesampula zokunyakaza okujikelezayo okungalingani ngezixazululo
