Isibonelo sokusheshisa kwamandla adonsela phansi

Izibonelo ezi-4 zezinkinga zokusheshisa amandla adonsela phansi

1. Kukhulu kangakanani ukusheshisa kwamandla adonsela phansi ebusweni benyanga? Ubunzima benyanga = 7,35 x 10²² kg, irediyasi yenyanga = amamitha ayi-1.740.000, i-universal gravitational constant (G) = 6,67 x 10^-11 N m² /kg²
Ingxoxo
Ifomula yomthetho wesibili kaNewton:

Incazelo: G = okungaguquki komhlaba wonke, M = isisindo somhlaba, m = isisindo sento, r = ibanga ukusuka enkabeni yomhlaba kuya entweni. Uma into iphezu komhlaba noma eduze kobuso bomhlaba khona-ke r = irediyasi yomhlaba.

Sebenzisa le fomula ukubala ukusheshisa okubangelwa amandla adonsela phansi (g) ebusweni beplanethi, lapho u-M = isisindo seplanethi, isathelayithi, inkanyezi njll. kanye no-r = irediyasi yeplanethi, isathelayithi, inkanyezi njll.
Ubukhulu bokusheshisa kwamandla adonsela phansi ebusweni benyanga buyini?

2. Ukusheshisa okujwayelekile kwamandla adonsela phansi ebusweni boMhlaba kulingana no g. Ekuphakameni okungu-R (R = irediyasi yomhlaba) ukusuka ebusweni bomhlaba, ubukhulu bokusheshisa komhlaba okudonsela phansi buvezwa... g.
Ingxoxo
Ukusheshisa ngenxa yamandla adonsela phansi kuhambisana ngokuphambene nesikwele sebanga:

R = irediyasi yomhlaba. Ekuphakameni kuka-R ukusuka ebusweni bomhlaba = ekuphakameni kuka-2R ukusuka enkabeni yomhlaba. Uma u-R ebhekwa njengo-1 khona-ke u-2R = 2(1) = 2.
Ekuphakameni okungu-R ukusuka ebusweni bomhlaba, ukusheshisa okubangelwa amandla adonsela phansi kunenani elingu-¼ g. Uma u-g = 9,8 m/s² Ngakho-ke ekuphakameni okungu-R ukusuka ebusweni bomhlaba, ukusheshisa okubangelwa amandla adonsela phansi kunenani elingu-2,45 m/s².

3. Isilinganiso sokusheshisa kwamandla adonsela phansi ebusweni boMhlaba g. Ekuphakameni okungu-2D (D = ububanzi bomhlaba) ukusuka ebusweni bomhlaba, ubukhulu bokusheshisa kwamandla adonsela phansi...
A. g
B. 1/2 g
C. 1/4 g
D. 1/8 g
E. 1/16 g
Ingxoxo:

Amandla adonsela phansi alingana nokusheshisa ngenxa yamandla adonsela phansi. Amandla adonsela phansi alingana ngokuphambene nesikwele sebanga, ngakho-ke ukusheshisa ngenxa yamandla adonsela phansi nakho kuyafana ngokuphambene nesikwele sebanga.
Incazelo: g = ukusheshisa kwamandla adonsela phansi, r = ibanga lendawo ukusuka enkabeni yomhlaba.
Ubuso boMhlaba bukude kakhulu no-R ukusuka enkabeni yoMhlaba, lapho u-R = i-radius yoMhlaba. Uma u-R engu-1, khona-ke ukusheshisa okubangelwa amandla adonsela phansi ebusweni boMhlaba yilokhu:
Lo mphumela ukhombisa ukuthi ebusweni boMhlaba, ukusheshisa kwamandla adonsela phansi kungu-g. Kuyini ukusheshisa kwamandla adonsela phansi ekuphakameni okungu-2D?
D = 2R. 2D = 2(2R) = 4R. R ingu-1 ngakho-ke u-4R = 4
Impendulo efanele ngu-E.

4. Uma indawo yento A ingu-2R ngaphezu komhlaba, kuyilapho indawo yento B ingu-3R ngaphezu komhlaba (R = irediyasi yomhlaba), khona-ke isilinganiso samandla ensimu yamandla adonsela phansi abonwa izinto u-A no-B...
A. 1: 8
B. 1: 4
C. 2: 3
D. 4: 9
Isahluko 9: 4
Ingxoxo:
R = irediyasi yomhlaba. R inenani elingu-1 ngakho-ke u-2R = 2 no-3R = 3.
Amandla ensimu yamandla adonsela phansi (g) ekuphakameni okungu-2R ngaphezu komhlaba yilawa:
Amandla ensimu yamandla adonsela phansi (g) ekuphakameni okungu-3R ngaphezu komhlaba yilawa:

Isilinganiso sika-g ekuphakameni okungu-2R no-3R yilesi:

Ukusheshisa okubangelwa amandla adonsela phansi ekuphakameni okungu-2R kukhulu ngokuphindwe izikhathi ezingu-2,25 kunokusheshisa okubangelwa amandla adonsela phansi ekuphakameni okungu-3R.
Impendulo efanele ngu-E.

Imibuzo Yokusheshisa Amandla Adonsela Phansi

1. Bala ubukhulu bokusheshisa kwamandla adonsela phansi ebusweni:
(a) Ilanga (b) I-Mercury (c) I-Venus (d) I-Mars (e) I-Jupiter (f) I-Saturn (g) I-Uranus (h) I-Neptune
Idatha edingekayo:
I-consistent yamandla adonsela phansi yomhlaba wonke (G) = 6,67 x 10^-11 N m² /kg²
Isisindo selanga = 1,99 x 10³⁰ kg, irediyasi yelanga = 2,44 x 10⁶ m
Isisindo seMercury = 3,30 x 10²³ kg, irediyasi yeMercury = 6,96 x 10⁸ m
Isisindo seVenus = 4,87 x 10²⁴ kg, irediyasi yeVenus = 6,05 x 10⁶ m
Isisindo seMars = 6,42 x 10²³ kg, irediyasi yeMars = 3,40 x 10⁶ m
Isisindo sikaJupiter = 1,90 x 10²⁷ kg, irediyasi yeJupiter = 6,91 x 10⁷ m
Isisindo seSaturn = 5,69 x 10²⁶ kg, irediyasi yeSaturn = 6,03 x 10⁷ m
Isisindo se-Uranus = 8,66 x 10²⁵ kg, irediyasi ye-Uranus = 2,56 x 10⁷ m
Isisindo seNeptune = 1,03 x 10²⁶ kg, irediyasi yeNeptune = 2,48 x 10⁷ m
Umthombo wedatha ngobuningi kanye nerediyasi yelanga namaplanethi

2. Ukusheshisa okujwayelekile kwamandla adonsela phansi ebusweni boMhlaba kulingana no g. Thola ukusheshisa okubangelwa amandla adonsela phansi ekuphakameni okungu-……. kusuka ebusweni bomhlaba:
(a) 2R (b) 3R (c) 4R (d) 5R (e) 6R (f) 7R (g) 8R (h) 9R (i) 10 R
Isifundazwe g nezinombolo!