Ukunyakaza kwemizimba emibili enesivinini esifanayo endaweni evundlile eqinile ngamandla okungqubuzana - izinkinga nezixazululo

1. Isisindo sebhokisi 1 singama-2 kg, isisindo sebhokisi 2 singama-4 kg, ukusheshisa kwamandla adonsela phansi kungu-10 m/s 2 , ubukhulu bamandla F bungu-40 Newton. I-coefficient ye-kinetic friction phakathi kwebhokisi 1 nephansi ingu-0.2 kanti i-coefficient ye-kinetic friction phakathi kwebhokisi 2 nephansi ingu-0.3. Thola (a) Ubukhulu kanye nesiqondiso sokusheshisa kwebhokisi (b) Ubukhulu bamandla asetshenziswa yibhokisi 1 ebhokisini 2 (F 12 ) kanye nobukhulu bamandla asetshenziswa yibhokisi 2 ebhokisini 1 (F 21 ).

Ukunyakaza kwemizimba emibili ngokusheshisa okufanayo endaweni evundlile eqinile ngamandla okungqubuzana - izinkinga nezixazululo 1

Isixazululo

Ukunyakaza kwemizimba emibili ngokusheshisa okufanayo endaweni evundlile eqinile ngamandla okungqubuzana - izinkinga nezixazululo 2

Kwaziwa:

Isisindo sebhokisi 1 (m1 ) = 2 kg

Isisindo sebhokisi 2 (m2 ) = 4 kg

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

Amandla F = 40 Newton,

I-coefficient yokungqubuzana kwe-kinetic phakathi kwebhokisi 1 kanye nephansi ( μ k1 ) = 0.2

I-coefficient yokungqubuzana kwe-kinetic phakathi kwebhokisi 2 kanye nephansi ( μ k2 ) = 0.3

Isisindo sebhokisi 1 (w 1 ) = m 1 g = (2)(10) = 20 Newtons

Isisindo sebhokisi 2 (w 2 ) = m 2 g = (4)(10) = 40 Newtons

Amandla avamile asetshenziswa ebhokisini 1 (N 1 ) = w 1 = 20 amaNewton

Amandla avamile asetshenziswa ebhokisini 2 (N 2 ) = w 2 = 40 Newtons

Amandla okungqubuzana kwe-kinetic asebenza ebhokisini 1 (f k1 ) = ( μ k1 )(N 1 ) = (0.2)(20) = 4 AmaNewton

Amandla okungqubuzana kwe-kinetic asebenza ebhokisini 2 (f k2 ) = ( μ k1 )(N 2 ) = (0.3)(40) = 12 AmaNewton

Isixazululo:

(a) Ubukhulu kanye nesiqondiso sokusheshisa kwebhokisi

ΣF = ma

F – f k1 – f k2 = (m 1 + m 2 ) a

40 – 4 – 12 = (2 + 4) a

24 = 6 a

a = 24/6

a = 4 m/s 2

Isiqondiso sokusheshisa = isiqondiso samandla aphelele = kwesokudla.

(b) Ubukhulu bamandla asetshenziswa yibhokisi 1 ebhokisini 2 (F 12 ) kanye nobukhulu bamandla asetshenziswa yibhokisi 2 ebhokisini 1 (F 21 ).

Bala ubukhulu be-F 12 :

ΣF = ma

F 12 – f k2 = (m 2 ) a

F 12 – 12 = (4)(4)

F 12 – 12 = 16

F 12 = 16 + 12

F 12 = 28 Newton

I-F 12 kanye ne-F 21 amandla esenzo kanye nokusabela asebenza ezintweni ezahlukene. I-F 12 kanye ne-F 21 zinobukhulu obufanayo kanye nesiqondiso esiphambene.

F 12 = 28 AmaNewton = F 21 = 28 AmaNewton.

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2. Isisindo sebhokisi 1 singama-2 kg, isisindo sebhokisi 2 singama-4 kg, ukusheshisa kwamandla adonsela phansi kungu-10 m/s 2 , amandla u-F angama-40 N. I-coefficient ye-kinetic friction phakathi kwebhokisi 1 kanye nephansi ingu-0.2 kanti i-coefficient ye-kinetic friction phakathi kwebhokisi 2 kanye nephansi ingu-0.3. Nquma (a) Ubukhulu kanye nesiqondiso sokusheshisa (b) Ukucindezeleka entanjeni exhumanisa amabhokisi. Unganaki isisindo sentambo.

Ukunyakaza kwemizimba emibili ngokusheshisa okufanayo endaweni evundlile eqinile ngamandla okungqubuzana - izinkinga nezixazululo 3

Kwaziwa:

Isisindo sebhokisi 1 (m1 ) = 2 kg

Isisindo sebhokisi 2 (m2 ) = 4 kg

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

Amandla F = 40 Newton,

I-coefficient yokungqubuzana kwe-kinetic phakathi kwebhokisi 1 kanye nephansi ingu-0.2 ( μ k1 ) = 0.2

I-coefficient yokungqubuzana kwe-kinetic phakathi kwebhokisi 2 kanye nephansi ingu-0.2 ( μ k2 ) = 0.3

Isisindo sebhokisi 1 (w 1 ) = m 1 g = (2)(10) = 20 Newtons

Isisindo sebhokisi 2 (w 2 ) = m 2 g = (4)(10) = 40 Newtons

Amandla avamile asetshenziswa ebhokisini 1 (N 1 ) = w 1 = 20 Newtons

Amandla avamile asetshenziswa ebhokisini 2 (N 2 ) = w 2 = 40 Newtons

Amandla okungqubuzana kwe-kinetic asebenza ebhokisini 1 (f k1 ) = ( μ k1 )(N 1 ) = (0.2)(20) = 4 AmaNewton

Amandla okungqubuzana kwe-kinetic asebenza ebhokisini 2 (f k2 ) = ( μ k1 )(N 2 ) = (0.3)(40) = 12 AmaNewton

Isixazululo:

(a) ubukhulu kanye nesiqondiso sokusheshisa

ΣF = ma

F – f k1 – f k2 = (m 1 + m 2 ) a

40 – 4 – 12 = (2 + 4) a

24 = 6 a

a = 24/6

a = 4 m/s 2

Ubukhulu bokusheshisa buyi-4 m/s 2 , isiqondiso sokusheshisa = isiqondiso samandla aphelele = kwesokudla.

(b) Ukucindezeleka entanjeni

Amandla asebenza ebhokisini 1 ohlangothini oluvundlile ukucindezela 1 (T 1 ) ngakwesokudla kanye namandla okungqubuzana kwe-kinetic 1 (f k1 ) ngakwesokunxele. Sebenzisa umthetho wesibili kaNewton:

ΣF = ma

T 1 – f k1 = m 1 a

I-T 1 – 4 = (2)(4)

Isigaba 1 – 4 = 8

I-T 1 = 8 + 4 = 12 Newton

Amandla asebenza ebhokisini 2 ohlangothini oluvundlile yi-tension 2 (T 2 ) eya ngakwesobunxele kanye namandla e-kinetic friction 2 (f k2 ) eya kwesokudla. Sebenzisa umthetho wesibili kaNewton :

ΣF = ma

F – T 2 – f k2 = m 2 a

40 – I-T 2 – 12 = (4)(4)

28 – T 2 = 16

I-T 2 = 28 – 16 = 12 uNewton

Ukucindezeleka entanjeni exhumanisa amabhokisi = T 1 = T 2 = T = 12 Newtons.

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  1. Isisindo kanye nesisindo
  2. amandla ajwayelekile
  3. Umthetho wesibili wokunyakaza kukaNewton
  4. Amandla okungqubuzana
  5. Ukunyakaza endaweni evundlile ngaphandle kwamandla okungqubuzana
  6. Ukunyakaza kwemizimba emibili ngokusheshisa okufanayo endaweni evundlile eqinile ngamandla okungqubuzana
  7. Ukunyakaza endizeni ethambekele ngaphandle kwamandla okungqubuzana
  8. Ukunyakaza endizeni ethambekele emangelengele ngamandla okungqubuzana
  9. Ukunyakaza e-lifti
  10. Ukunyakaza kwemizimba exhunywe ngezintambo nama-pulley
  11. Imizimba emibili enesilinganiso esifanayo sokusheshisa
  12. Ukuzungeza ijika eliyisicaba - amandla okunyakaza okujikelezayo
  13. Ukuzungeza ijika eligobile - amandla okunyakaza okujikelezayo
  14. Ukunyakaza okufanayo kumbuthano ovundlile
  15. Amandla aphakathi ahambisanayo ajikelezayo

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