Ukunyakaza phansi ekwindla ekhululekile - izinkinga nezixazululo

Izinkinga Ezixazululiwe Ekuhambeni Okuqondile – Ukunyakaza Okuphansi Ekuweni Okukhululekile

1. Ibhola liphonswa phansi liqonde phezulu ngesivinini sokuqala esingu-10 m/s bese lifika phansi ngemizuzwana emi-2. Thola isivinini sokugcina ngaphambi nje kokuba ibhola lishaye phansi. Ukusheshisa kwamandla adonsela phansi (g) = 10 m/s ² . Unganaki ukumelana kwamanzi.

Kwaziwa:

Ijubane lokuqala (v _o ) = 10 m/s

Isikhathi esidlulile (t) = imizuzwana emi-2

Ukusheshisa kwamandla adonsela phansi (g) = 10 m/s ²

Okufunwayo: Ijubane lokugcina (v _t )

Isixazululo:

Ukusheshisa okungu-10 m/s ² kusho ukwanda kwesivinini ngo- 10 m/s ngomzuzwana. Ngemva kwemizuzwana emi-3, isivinini = 30 m/s.

Ijubane lokugcina = 10 m/s + 20 m/s = 30 m/s.

Izibalo ze-Kinematic zokunyakaza ngokusheshisa okuqhubekayo , njengoba kuboniswe ngezansi:

v _t = vo _o + at ……. 1

h = vot ₊ ½ ku- ² ………. 2

v _t ² = v _o ² + 2 ah ………. 3

v _t = vo _o + g t

v _t = 10 + (10)(2)

v _t = 10 + 20 = 30 m/s

Ijubane lokugcina = v _t = 30 m/s

2. Itshe liphonswa phansi liqonde phezulu lisuka ebhulohweni ngesivinini sokuqala esingu-5 m/s bese lifika emanzini ngemizuzwana emi-2. Bala ukuphakama kwebhuloho.

Kwaziwa:

Ijubane lokuqala (v _o ) = 5 m/s

Isikhathi esidlulile (t) = imizuzwana emi-2

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s ²

Okufunwayo: ukuphakama kwebhuloho (h)

Isixazululo:

h = vot ₊ ½ gt ²

h = (5)(2) + ½ (10)(2) ²

h = 10 + (5)(4)

h = 10 + 20

h = amamitha angu-30

3. Ibhola liphonswa phansi liqonde phezulu ngesivinini sokuqala esingu-10 m/s ukusuka ekuphakameni kwamamitha angu-80. Thola (a) Isikhathi emoyeni (b) Ijubane lokugcina ngaphambi nje kokuba ibhola lishaye phansi.

Kwaziwa:

ukuphakama (h) = amamitha angu-80

Ijubane lokuqala (v _o ) = 10 m/s

Ukusheshisa kwamandla adonsela phansi (g) = 10 m/s ²

Kufunwa:

(a) Isikhawu sesikhathi (t)

(b) Ijubane lokugcina (v _t )

Isixazululo:

(a) Isikhawu sesikhathi (t)

Ijubane lokugcina:

v _t ² = v _o ² + 2 gh

v _t ² = (10) ² + 2(10)(80) = 100 + 1600 = 1700

v _t = 41 m/s

Isikhawu sesikhathi (t):

v _t = vo _o + g t

41 = 10 + (10)(t)

41 – 10 = 10 t

31 = 10 t

t = 31 / 10 = 3,1 imizuzwana

(b) Ijubane lokugcina (v _{t )}?

v _t = 41 m/s

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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