Amandla adonsela phansi - izinkinga nezixazululo

1. Umzimba onesisindo esingu-1 kg uwela uphumule, kusukela ekuphakameni okungamamitha ayi-10.

Nquma:

(a) Umsebenzi owenziwe ngamandla adonsela phansi

(b) Ushintsho emandleni adonsela phansi

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

Kwaziwa:

Isisindo (m) = 1 kg

Ukuphakama (h) = 10 m

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

Isisindo (w) = mg = (1 kg)(10 m/s ² ) = 10 N

Isixazululo:

(a) Umsebenzi owenziwe ngamandla adonsela phansi

W = wh = mgh

W = (1)(10)(10) = 100 amaJoule

(b) Ushintsho emandleni adonsela phansi

Ushintsho emandleni adonsela phansi lulingana nomsebenzi owenziwa amandla adonsela phansi.

Δ EP = 100 Joule

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2. Into engu-10 N ishelela phansi endaweni ebushelelezi ethambekele ngamamitha amabili. Thola umsebenzi owenziwe ngamandla esisindo!

Kwaziwa:

isisindo (w) = 10 N

w _x = w isono θ = (10)(isono 30 ^o ) = (10)(0.5) = 5 N

d = 2 m

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

Okufunwayo: umsebenzi owenziwe ngamandla esisindo

Isixazululo:

W = F d = w _x d = (5)(2) = 10 amaJoules

Isixazululo esihlukile:

Isono 30 ^o = h / d

0.5 = amahora / 2

h = (0.5)(2)

h = 1 m

Umsebenzi owenziwe ngamandla esisindo;

W = F d = wh = (10 N)(1 m) = 10 N m = 10 Joules

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3. Into engamagremu angu-1,500 ebangeni elingamamitha angu-20 ngaphezu komhlabathi , ukuwa kwayo phansi ngokukhululeka. Iyini amandla adonsela phansi ale nto. Ukusheshisa ngenxa yamandla adonsela phansi kungu-10 m/s ².

Kwaziwa:

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

Isisindo (m) = 1500 amagremu = 1500/1000 amakhilogremu = 1.5 amakhilogremu

Ukuphakama (h) = amamitha angu-20

Okufunwayo: Amandla adonsela phansi

Isixazululo:

PE = mgh = (1.5 kg)(10 m/s ² )(20 m) = 300 kg m ² /s ² = 300 Joules

4. Ngokusekelwe esithombeni esingezansi, uma isisindo sento 1 singama-2 kg kanti isisindo sento 2 singama-4 kg, ukuqhathanisa amandla angaba khona ento 1 kanye nento 2 kungu …..

Kwaziwa:

Isisindo sento 1 (m₁) = 2 kg

Isisindo sento 2 (m ₂ ) = 4 kg

Ukuphakama 1 (h ₁ ) = amamitha angu-12

Ukuphakama 2 (h ₂ ) = amamitha angu-9

Okufunwayo: Ukuqhathaniswa kwamandla angaba khona ento 1 kanye nento 2

Isixazululo:

PE = mgh

m = isisindo (iyunithi yayo yamazwe ngamazwe yi-kilogram, i-kilogram efingqiwe)

g = ukusheshisa ngenxa yamandla adonsela phansi (iyunithi yayo yamazwe ngamazwe ingamamitha ngomzuzwana isikwele, isifinyezo m/s ² )

h = ukuphakama (iyunithi yayo yamazwe ngamazwe iyimitha, efingqiwe m)

I-PE = amandla adonsela phansi (iyunithi yayo yamazwe ngamazwe yi-kg m2 ^/ s ² noma i-Joule)

Amandla adonsela phansi ento 1:

EP ₁ = m ₁ gh ₁ = (2)(g)(12) = 24 g

Amandla adonsela phansi ento 2:

EP ₂ = m ₂ gh ₂ = (4)(g)(9) = 36 g

Ukuqhathaniswa kwamandla angase abe khona ento 1 kanye nento 2:

I-PE ₁ : I-PE ₂

24 g : 36 g

24: 36

24/12: 36/12

2: 3

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1. Umsebenzi owenziwa ngezinkinga zamandla nezixazululo
2. Izinkinga zamandla e-kinetic kanye nezixazululo zomsebenzi
3. Izinkinga nezixazululo zesimiso samandla okusebenza-okusebenza ngomshini
4. Izinkinga zamandla adonsela phansi kanye nezixazululo ezingaba khona
5. Amandla angaba khona ezinkinga zentwasahlobo ezinwebekayo nezixazululo
6. Izinkinga zikagesi nezixazululo
7. Ukusetshenziswa kokulondolozwa kwamandla omshini ukuze kuqhutshekwe nokuwa kwamahhala
8. Ukusetshenziswa kokulondolozwa kwamandla omshini wokunyakaza okuphezulu nokwehla ekunyakazeni kokuwa kwamahhala
9. Ukusetshenziswa kokulondolozwa kwamandla okusebenza ukuze kushukunyiswe endaweni egobile
10. Ukusetshenziswa kokulondolozwa kwamandla omshini ukuze kushukunyiswe endizeni ethambekele
11. Ukusetshenziswa kokulondolozwa kwamandla okusebenza ngomshini wokunyakaza okubonakalayo