Amandla okungqubuzana okungaguquki kanye nokujikijelana kwe-kinetic - izinkinga nezixazululo

Izinkinga ezixazululiwe emithethweni kaNewton yokunyakaza - Amandla okungqubuzana okungaguquki kanye nokujikijelana kwe-kinetic

1. Into ihlezi phansi evundlile. I-coefficient yokungqubuzana okungaguquki ingu-0.4 futhi ukusheshisa kwamandla adonsela phansi ingu-9.8 m/s2. Thola (a) Amandla aphezulu okungqubuzana okungaguquki (b) Amandla amancane ka-F 

Amandla okungqubuzana okungaguquki kanye nokujiya – izinkinga nezixazululo 1

Isixazululo

Amandla okungqubuzana okungaguquki kanye nokujiya – izinkinga nezixazululo 2

Kwaziwa:

Imisa (m) = 1 kg

I-coefficient yokungqubuzana okungaguquki (μs) = 0.4

Ukusheshisa kwamandla adonsela phansi (g) = 9.8 m/s2

Isisindo (w) = mg = (1 kg)(10 m/s2) = 10 kg m/s2 = 10 uNewton

amandla ajwayelekile (N) = w = 10 Newton

Kufunwa:

(A) Amandla aphezulu okungqubuzana okungaguquki (b) I amandla amancane ka-F

Isixazululo:

(A) Amandla aphezulu okungqubuzana okungaguquki

fs = μs N

fs = (0.4)(9.8 N) = 3.92 Newton

(b) I amandla amancane ka-F

Uma amandla u-F esetshenziswa entweni kodwa into ingashukunyiswa, ngakho-ke kumele kube namandla okungqubuzana okungaguquki asetshenziswa phansi entweni. Uma into izoqala ukuhamba, amandla okungqubuzana okungaguquki edlula, kumele kube namandla okungqubuzana okungaguquki. Into iqala ukuhamba uma u-F emkhulu kunamandla amakhulu okungqubuzana okungaguquki.

Ngakho amandla amancane ka-F = amandla amakhulu okungqubuzana okungaguquki = 3.92 AmaNewton.

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2. Ibhokisi elingu-1 kg lidonswa endaweni evundlile ngamandla u-F, ngakho ibhokisi lihamba ngesivinini esingaguquki. Uma i-kinetic friction coefficient ingu-0.1, thola ubukhulu bamandla u-F! (g = 9.8 m/s2)

Amandla okungqubuzana okungaguquki kanye nokujiya – izinkinga nezixazululo 3

Kwaziwa:

I-kinetic friction coefficient (μk= = 0.1

Isisindo sebhokisi (m) = 1 kg

Ukusheshisa kwamandla adonsela phansi (g) = 9.8 m/s2

Isisindo (w) = mg = (1 kg)(9.8 m/s2) = 9.8 kg m/s2 = 9.8 uNewton

Amandla ajwayelekile (N) = w = 9.8 amaNewton

wayefuna : F

Isixazululo:

Umthetho wokuqala kaNewton ithi uma kungekho mandla asebenzayo entweni, yonke into iyaqhubeka isesimweni sayo sokuphumula, noma ijubane eliqhubekayo emgqeni oqondile.

Ngakho-ke uma into ihamba ku- ijubane elingaguquki, akumelwe kube khona amandla aphelele (ΣF = 0). I-Force F ifakwa entweni ngendlela efanele ukuze amandla okungqubuzana kwe-kinetic afakwe entweni eya ngakwesobunxele.

∑F=0

F – fk = 0

F = fk

Amandla okungqubuzana kwe-kinetic:

fk = μk N = (0.1)(9.8 N) = 0.98 AmaNewton

into ihamba ngesivinini esingaguquki, F = fk = 0.98 uNewton

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3. Into ishelela phansi indiza ethambekele ngesivinini esingaguquki. Thola i-kinetic friction coefficient (μk). g = 9.8 m/s2

Amandla okungqubuzana okungaguquki kanye nokujiya – izinkinga nezixazululo 4

Isixazululo

Amandla okungqubuzana okungaguquki kanye nokujiya – izinkinga nezixazululo 5

w = isisindo, wx = ingxenye evundlile yesisindo, amaphuzu eceleni kokwenyuka, wy = ingxenye eqondile yesisindo, eqondile endizeni ethambekele, N = amandla avamile, fk = amandla okungqubuzana kwe-kinetic.

Kwaziwa:

Isisindo (m) = 1 kg

Ukusheshisa kwamandla adonsela phansi (g) = 9.8 m/s2

isisindo (w) = mg = (1 kg)(9.8 m/s2) = 9.8 kg m/s2 = 9.8 uNewton

wx = isono 30o = (9.8 N)(0.5) = 4.9 Newton

wy = w cos 30o = (9.8 N)(0.5)√3 = 4.9√3 Newton

Amandla ajwayelekile (N) = wy = 4.9√3 Newton

Kufunwa: i-coefficient yokungqubuzana kwe-kinetic (μk)

Isixazululo:

Into ishelela phansi endizeni ethambekele ngesivinini esingaguquki ukuze amandla anetha = 0.

∑F=0

wx - fk = 0

wx =fk

wx = μk N

I-5 = μk (5√3)

μk = 5 / 5√3

μk = 1 /√3

μk = 0.58

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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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