Ukusetshenziswa kokulondolozwa kwamandla okusebenza ukuze kuqhutshekwe nokuwa ngokukhululeka - izinkinga nezixazululo

1. Umzimba onesisindo esingu-1 kg uwela ngokukhululeka ekuphumuleni, kusukela ekuphakameni okungamamitha angu-80. Ukusheshisa ngenxa yamandla adonsela phansi is 10 m / s². Kuyini amandla kinetic lapho umzimba ushaya phansi.

Kwaziwa:

Imisa (m) = 1 kg

Ukuphakama (h) = 80 m

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Okufunayo: amandla e-kinetic lapho umzimba ushaya phansi

Isixazululo:

The initial amandla emishini (MINA_o) = amandla adonsela phansi (PE)

ME_o =PE = mgh = (1)(10)(80) = 800 amaJoules

Amandla okugcina omshini (ME_t) = amandla kinetic (KE)

Isimiso se ukulondolozwa kwamandla okusebenza ngomshini :

ME_o =ME_t

PE =KE

800=KE

Amandla okugcina e-kinetic yi- AmaJoules angu-800.

2. Umzimba onesisindo esingu-4 kg ukuwa kwamahhala kusukela ekuphumuleni, kusukela ekuphakameni kwamamitha ayi-10. Ukusheshisa ngenxa yamandla adonsela phansi kuyinto 10 ms^-2. Iyini amandla e-kinetic kanye nesivinini esingamamitha ama-5 ngaphezu komhlabathi.

Kwaziwa:

Ushintsho ekuphakameni (h) = 10 – 5 = amamitha angu-5s

Isisindo (m) = 4 kg

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Okufunayo: Amandla e-kinetic amamitha angu-5 ngaphezu komhlabathi kanye ijubane elingamamitha ama-5 ngaphezu komhlabathi

Isixazululo:

(A) Amandla e-kinetic amamitha angu-5 ngaphezu komhlabathi

Amandla okuqala omshini (ME_o) = amandla adonsela phansi (PE)

ME_o =PE = mgh = (4)(10)(5) = 200 amaJoules

Amandla okugcina omshini (EM)_t) = amandla kinetic (EK)

ME_t =KE

Isimiso sokulondolozwa kwamandla omshini sithi amandla okuqala omshini = amandla okugcina omshini.

ME_o =ME_t

200=KE

Amandla e-kinetic amamitha ama-5 ngaphezu komhlabathi AmaJoules angu-200.

(B) isivinini ku Imitha ye-5ngaphezu komhlabathi

Amandla okuqala omshini (ME_o) = amandla okugcina omshini (ME_t)

PE =KE

200 = ½ mv²

2(200) / 4 = v²

100 = v²

v = √100

v =10 m / s

Ijubane lomzimba ngamamitha ama-5 ngaphezu komhlabathi liyi-10 m/s.

3. Umango iwela ngokukhululeka ekuphumuleni, isuka ekuphakameni kwamamitha amabili. Ukusheshisa ngenxa yamandla adonsela phansi kuyinto 10 ms^-2Thola ijubane lemango uma lifika phansi.

Kwaziwa:

Ukuphakama (h) = amamitha ama-2s

Ukusheshisa ngenxa yamandla adonsela phansi (g) = 10 m/s²

Kufunwa: ijubane likamango uma lishaya phansi.

Isixazululo:

Amandla okuqala omshini (ME_o) = amandla adonsela phansi (PE)

ME =PE = mgh = m (10)(2) = 20 m

Amandla okugcina omshini (ME_t) = amandla e-kinetic (KE)

ME_t =KE = ½ mv²

Isimiso sokulondolozwa kwamandla omshini sithi amandla okuqala omshini = amandla okugcina omshini.

ME_o =ME_t

20 m = ½ mv²

20 = ½ v²

2(20) = v²

40 = v²

v = √40 = √(4)(10) = 2√10 m/s

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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