Ukunyakaza ngesivinini esingaguquki - izinkinga nezixazululo

Izinkinga Ezixazululiwe Ekuhambeni Okuqondile - Ijubane eliqhubekayo

1. Imoto ihamba ngesivinini esingaguquki esingu-10 m/s. Thola ibanga ngemva kwemizuzwana eyi-10 nemizuzwana engama-60.

Isixazululo

Ijubane elingaguquki elingamamitha ayi-10 ngomzuzwana lisho ukuthi imoto ihamba amamitha ayi-10 njalo ngomzuzwana owodwa.

Ngemva kwemizuzwana emibili, imoto ihambe amamitha angu-20,

Ngemva kwemizuzwana emibili, imoto ihambe amamitha angu-50,

Ngemva kwemizuzwana eyi-10, imoto ihambe amamitha ayi-100,

Ngemva kwemizuzwana eyi-60, imoto ihambe amamitha ayi-600.

2. Imoto ihamba emgwaqweni oqondile ngesivinini esingaguquki esingu-72 km/h. Nquma ibanga lemoto ngemva kwemizuzu emi-2 nemizuzu emi-5.

Isixazululo

72 km/h = (72)(amamitha ayi-1000) / imizuzwana engu-3600 = 72,000 / imizuzwana engu-3600 = amamitha angu-20/umzuzwana.

Ijubane elingaguquki kumamitha angu-20 ngomzuzwana lisho ukuthi imoto ihamba amamitha angu-20 njalo ngomzuzwana owodwa.

Ngemva kwemizuzwana eyi-120 noma imizuzu emi-2, imoto ihamba amamitha angama-20 x 120 = amamitha angama-2400,

Ngemva kwemizuzwana eyi-300 noma imizuzu emi-5, imoto ihamba amamitha angama-20 x 300 = amamitha angama-6000.

3. Umzimba uhamba emgwaqweni oqondile amamitha ayi-100 ngemizuzwana engama-50. Thola isivinini somzimba.

Isixazululo

Amamitha ayi-100 / imizuzwana engama-50 = amamitha ayi-10 / imizuzwana emi-5 = amamitha ama-2/umzuzwana.

4. Thola isivinini ngokwendlela echazwe kumdwebo ongezansi….

Isixazululo

Isivinini = Ibanga / isikhathi esidlulile

Isivinini = amamitha ama-2 / umzuzwana o-1 = amamitha ama-4 / imizuzwana emi-2 = amamitha ayi-6 / imizuzwana emi-3 = amamitha ayi-8 / imizuzwana emi-4 = amamitha ama-2 ngomzuzwana.

5. Izimoto u-A no-B ziyasondelana emigwaqweni ehambisanayo. Uma ibanga eliphakathi kwezimoto ezimbili lingamamitha ayi-100, imoto u-A ihamba ngesivinini esingaguquki esingu-10 m/s, imoto u-B ihamba ngesivinini esingaguquki esingu-40 m/s. Nquma (a) ibanga lemoto u-A ngaphambi kokudlula imoto u-B (b) isikhathi esiphakathi ngaphambi kokudlula imoto u-B.

Isixazululo

Imoto A ihamba ngesivinini esingaguquki kumamitha ayi-10 ngomzuzwana, okusho ukuthi imoto A ihamba amamitha ayi-10 njalo ngomzuzwana. Ngemva kwemizuzwana emi-2, imoto ihamba amamitha angama-20.

Imoto B ihamba ngesivinini esingaguquki kumamitha angu-40 ngomzuzwana, okusho ukuthi imoto B ihamba amamitha angu-40 njalo ngomzuzwana. Ngemva kwemizuzwana emibili, imoto B ihamba amamitha angu-80.

Amamitha angu-20 + amamitha angu-80 = amamitha ayi-100.

(a) Ibanga lemoto A ngaphambi kokudlula imoto B lingamamitha angama-20. Ibanga lemoto B ngaphambi kokudlula imoto A lingamamitha angama-80.

(b) Isikhathi semoto u-B ngaphambi kokudlula imoto u-A singamasekhondi ama-2. Isikhathi semoto u-A ngaphambi kokudlula imoto u-B singamasekhondi ama-2

5. Uma i-speedometer yemoto ikhombisa isivinini esingu-108 km/h, thola ibanga elihanjwa ngemoto ngomzuzu owodwa.

Isixazululo:

I-speedometer iyithuluzi lokukala isivinini. Ijubane lemoto lingu-108 km/ihora.
108 km / h = (108) (amamitha ayi-1000) / imizuzwana engu-3600 = amamitha angu-30 ngomzuzwana.

Umzuzu owodwa = imizuzwana engama-60

Ijubane lemoto elingamamitha angu-30 ngomzuzwana lisho ukuthi imoto ifinyelela kumamitha angu-30 ngomzuzwana owodwa.

Ngemva komzuzwana owodwa, imoto iqhubekela phambili kuze kufike kumamitha angu-1 x 30 = amamitha angu-30.

Ngemva kwemizuzwana emibili, imoto iqhubekela phambili kuze kufike kumamitha angu-2 x 30 = amamitha angu-60.

Ngemva kwemizuzwana emibili, imoto iqhubekela phambili kuze kufike kumamitha angu-60 x 30 = amamitha angu-1800.

6. Tom uphonsa a ibhola liqondile ku-Andrew. UTom no-Andrew bakhona ihlukaniswe kuze kufike ku-10.08 mama-eterIbhola liyaphonswa ovundlile kanye nezinyathelo at 20 m/s (ungawanaki amandla adonsela phansi). Andrew hits ibhola 4.00 x 10^-3 imizuzwana embalwa ngemuva kokuphonswa kwebhola. Uma ibhola umshayi uhamba ngokungaguquki ijubane ngesivinini esingu-5.00 m/s, ibhola lishaywa yi- umshayi emva kwe umshayi udlulela kude…

Kwaziwa:

Ibanga phakathi kukaTom no-Andrew = amamitha ayi-10.08

Isivinini sebhola (v) = 20 m/s

Isikhathi sesikhawu (t) = 4 x 10^-3 imizuzwana = 0.004 imizuzwana

Isivinini somshayi (v) = 5 m / s

Okufunayo: Ibhola lishaywa ngumuntu oshaya ibhola ngemva kokuba ibhola selihambe ibanga elide...

Isixazululo:

Ibanga lebhola:

s₁ = vt = (20)(0.004) = 0.08 amamitha

Ibanga lomshayi:

s₂ = vt = 5 t

Ibanga lebhola + ibanga lomshayi = ibanga phakathi kukaTom no-Andrew.

0.08 + 5 t = 10.08

5 t = 10.08 – 0.08

5 t = 10

t = 10 / 5

t = imizuzwana emi-2

Ibanga lomshayi:

s₂ = vt = 5 t = (5) (2) = amamitha ayi-10

7. Umzingeli onemoto yakhe uxosha inyamazane. Imoto ihamba ngesivinini esingu-72 km/h kanti inyamazane igijima ngesivinini esingu-64.8 km/h. Lapho ibanga phakathi kwemoto nenyamazane lingama-2012 metres, umzingeli udubula isibhamu sakhe. Izinhlamvu ziphuma esibhamuni ngama-200 m/s. Thola isikhathi lapho inyamazane idutshulwa khona.

A. 0.5 imizuzwana

B. 1 imizuzwana

C. 1.25 imizuzwana

D. 1.5 imizuzwana

Kwaziwa:

Isivinini semoto (v)_b) = 72 km/h = (72)(1000 m) / 3600 s = 20 m/s

Isivinini senyamazane (v)_r) = 64.8 km/h = (64.8)(1000 m) / 3600 s = 64800 m / 3600 s = 18 m/s

Uma inhlamvu idutshuliwe, ibanga eliphakathi kwemoto nenyamazane liyancishiswa (s) = amamitha angu-202

Isivinini somlilo (v)_p) = 20 m/s + 200 m/s = 220 m/s

Izikhali ziphethwe ngabazingeli abasemotweni ehamba ngesivinini esingama-20 m/s ukuze isivinini semoto siphinde sengezwe esivinini senhlamvu.

Okufunayo: Nquma isikhathi lapho inyamazane idutshulwa khona

Isixazululo:

Cabanga ngezimoto nezinyamazane ezihamba ngesivinini esingaguquki.

Isibalo: v = s / t noma s = vt

v = isivinini, s = ibanga, t = isikhawu sesikhathi

Ibanga = 202 + X_r = 202 + v_r t = 202 + 18 t

Ibanga = Y_p =v_p t = 220 t

Ibanga elihanjwa yinyamazane = ibanga elihanjwa yinhlamvu

202 + 18 t = 220 t

202 = 220 t – 18 t

202 = 202 t

t = 202 / 202

t = 1 umzuzwana

Impendulo efanele ngu-B.

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1. Ibanga kanye nokufuduka
2. Isivinini esimaphakathi kanye nesivinini esimaphakathi
3. Ijubane eliqhubekayo
4. Ukusheshisa okuqhubekayo
5. Ukunyakaza kwamahhala kokuwa
6. Ukunyakaza phansi ekwindla yamahhala
7. Ukunyakaza okuphezulu nokwehlayo ekuwa okukhululekile