Simba guru - matambudziko nemhinduro

Simba guru - matambudziko nemhinduro

1. Chivharo chehuni chine urefu = 2.5 m, upamhi = 0.5 m uye kukwirira = 0.4 m. kuwanda yemvura inosvika 1000 kg/m23Kana bhokisi racho rikaiswa mumvura, chii chinonzi simba rinofema... Kukurumidza kunokonzerwa negiravhiti ndeye 10 N/kg.

Zvinozivikanwa:

Vhoriyamu yebhuroko (V) = kureba x upamhi x kukwirira = 2.5 x 0.5 x 0.4 = 0.5 m3

Kuwanda kwemvura (ρ) = 1000 kg/m3

Kuwedzera nekuda kwegiravhiti (g) = 10 N/kg

Zvaidiwa: Hukuru hwesimba rinopfuta

Solution:

Fomura yesimba rinoyerera:

F = ρ g V

F = simba rinofema, ρ = density yemvura, g = kukurumidza nekuda kwegiravhiti, V = vhoriyamu

F = (1000)(10)(0.5) = (1000)(5) = 5000 Newtons

2. Huremu hwechinhu chiri mumhepo i100 N. Chinhu chacho chinoiswa mumvura. Kuwedzera kwehuwandu hwemvura i1.5 m3Kana huremu hwemvura hwakatarwa huri 10 N/m3, huremu hwechinhu chiri mumvura chii.

Zvinozivikanwa:

Chinhu uremu mumhepo (w) = 100 Newton

Kuwedzera kwehuwandu hwemvura = huwandu hwechinhu chiri mumvura (V) = 1.5 m3

Huremu chaihwo hwemvura = 10 N/m3

Zvaidiwa: Kurema kwechinhu mumvura

Solution:

Huremu hwechinhu mumvura = huremu hwechinhu mumhepo – simba rinopfungaira

Huremu hwechinhu mumvura = 100 Newton – simba rinoyerera

Fomura yesimba rinoyerera:

FA = ρ g V

FA = simba rinoyerera = simba rinobuda mumvura rinobuda mumvura

ρ = kuwanda kwemvura

g = kukurumidza nekuda kwesimba rinokwevera pasi

V = huwandu hwechinhu mumvura

Huremu chaihwo:

Huremu chaihwo hwemvura = 10 N/m3

w / V = ​​​​10 N/m3

mg / V = ​​​​10 N/m3

m (10) / V = ​​​​10 N/m3

m / V = ​​​​1 kg/m3

ρ = 1 kg/m3

Kuwanda kwemvura ndeye 1 kg/m23

Hukuru hwesimba rinoyerera :

FA = ρ g V = (1 kg/m3)(10 m/s2)(1.5 m3) = 15 kg m/s2 = 15 Newton

Kurema kwechinhu mumvura:

Huremu hwechinhu mumvura = 100 Newtons – 15 Newtons

Huremu hwechinhu mumvura = 85 Newtons

3. Ngarava iri kufamba mugungwa inopinda murwizi rwakafara uye rwakadzama. Thuwandu hwemvura yegungwa hunosvika 1100 kg/m23, ivo kuwanda kwemvura yerwizi inorema 1000 kg/m3. Sarudza kuenzanisa kwe huwandu hwechinhu chacho huri mumvura yegungwa uye in mvura yerwizi.

onawo  Kufamba kwemutsetse kusingaenzaniswi - matambudziko nemhinduro

A. 11: 10

B. 10: 11

C. 121 : 100

D. 1: 1

Zvinozivikanwa:

Kuwanda kwemvura yegungwa (ρ)1) = 1100 kg/m3

Kuwanda kwemvura yerwizi (ρ)2) = 1000 kg/m3

Kuda: Ckuenzanisa kwe huwandu hwechinhu chacho huri mumvura yegungwa uye in mvura yerwizi. kuenzanisa kwe huwandu hwechinhu chacho huri mumvura yegungwa uye in mvura yerwizi.

Solution:

If chinhu chacho kuyandama tsimba rehuku rinoyerera (F)B) = uremu (w):

Simba rinopa simba - matambudziko nemhinduro 1

Archimedesmusimboti inotaura kuti simba rinopfungaira rinobata chinhu chiri mu mvura mvura (mvura) yakaenzana nehuremu hwemvura yainobvisa. Vhoriyamu yechinhu chiri mumvura (mvura) yakaenzana nehuwandu hwemvura inofambiswa.


Kuenzanisa huwandu hwechinhu chiri mumvura yegungwa uye mu mvura yerwizi:

Simba rinopa simba - matambudziko nemhinduro 2

Mhinduro chaiyo ndeiyi B.

4. Ndarama, ine huremu hwemagiramu 193, iri muparafini ine simba rinosvika 8000 dynes. Kana kukurumidza nekuda kwegiravhiti iri 10 m/s2 uye kuwanda kwe parafini ine 0.8 gr/cm3, ipapo ona ari kuwanda kwe goridhe.

A. 1.93 gr/cm3

B. 8.65 gr/cm3

C. 19.3 gr/cm3

D. 193 gr/cm3

Zvinozivikanwa:

Huremu hwegoridhe (mgoridhe) = magiramu mazana mashanu = 0.193 kg

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s2

Simba rinopa simba (F)A) = 8000 dynes = 8 x 103 dyne = (8 x 103)(10-5 N) = 8 x 10-2 N = 0.08 Newton

Kuwanda kweparafini (ρ) = 0.8 gr/cm3 = 800 kg / m3

Zvaidiwa: Kuwanda kwegoridhe

Solution:

Kurema kwegoridhe mumhepo:

w = mg = ρb V g —– Equation 1

V ivhoriyamu yegoridhe iri muparafini.

Simba rinopa simba (F)B) yakaenzana nehuremu hwegoridhe riri mumhepo (w) kubvisa huremu hwegoridhe riri muparafini (w'):

onawo  Kuwedzera nzvimbo - matambudziko nemhinduro

w – w' = FA

w – w' = ρf V g —– Equation 2

V ihuwandu hwegoridhe riri muparafini.

Ma equation ese ari pamusoro anogona kunyorwa zvakare pazasi:

Simba rinopa simba - matambudziko nemhinduro 3

Simba rinopa simba - matambudziko nemhinduro 4

Mhinduro chaiyo ndeinoti C.

  1. Ndeipi nheyo huru iri shure kwesimba rinopfuta?
    • mhinduro: Nheyo huru iri shure kwesimba rinoyerera ndiyo Nheyo yaArchimedes. Inotaura kuti chinhu chakanyudzwa mumvura chinosangana nesimba rinokwira rinonzi simba rinoyerera iro rakaenzana nehuremu hwemvura inobviswa nechinhu chacho.
  2. Sei chinhu chichiita sechikareruka kana chakanyudzwa mumvura?
    • mhinduro: Kana chinhu chikanyudzwa mumvura, chinobvisa huwandu hwakati hwemvura. Huremu hwemvura iyi inobviswa hunoita kuti chinhu chacho chiwedzere kusimba, izvo zvinodzivisa huremu hwechinhu chacho, zvichiita kuti chinzwe chakareruka.
  3. Kana chinhu chikayangarara pamusoro pemvura, huremu hwechinhu chacho hunoenzaniswa sei nesimba rinoyangarara pachiri?
    • mhinduro: Kana chinhu chikayangarara, simba rinoita basa racho rinoenzana nehuremu hwechinhu chacho. Ndosaka chinhu chacho chikaramba chiri panzvimbo imwe chete chisina kunyura kana kukwira.
  4. Simba rinobhururuka rinoshanda pazvinhu zviri mumhepo here?
    • mhinduro: Ehe, simba rinofema rinoshanda pazvinhu zviri mumvura chero ipi zvayo, kusanganisira mhepo. Zvisinei, nekuti mhepo haina kusimba zvakanyanya kupfuura mvura yakaita semvura, simba rinofema riri mumhepo idiki zvikuru uye kazhinji harina basa nezvinhu zvezuva nezuva.
  5. Sei zvimwe zvinhu zvichinyura mumvura asi zvimwe zvichiyangarara?
    • mhinduro: Kana chinhu chichinyura kana kuyerera zvinoenderana nehukama huripo pakati pehuremu hwacho nesimba rinoyerera. Kana simba rinoyerera (nekuda kwemvura inoyerera) rakakura kupfuura huremu hwechinhu, chinoyerera. Kana huremu hwacho hwakakura, chinonyura.
  6. Dai waizotora bhora resimbi risina chinhu nebhora resimbi rakasimba rine huwandu hwakafanana uye chinhu chakafanana, wozvinyudza mumvura, ndechipi chaizonzwa simba guru rekubhururuka?
    • mhinduro: Simba rinoyerera rinoenderana nehuwandu hwemvura inoyerera kwete nehuremu hwechinhu chacho. Sezvo mabhora ese ari maviri achibvisa huwandu hwakafanana hwemvura, aizosangana nesimba rakafanana rekuyerera.
  7. Sei ngarava dzakagadzirwa nesimbi, dzine huremu hwakanyanya kupfuura mvura, dzichiyangarara?
    • mhinduro: Ngarava dzakagadzirwa dzine nzvimbo dzakakura dzisina chinhu mukati, zvinoreva kuti huwandu hwadzo hwese hushoma pane hwemvura. Mvura inobviswa nengarava ine simba rinoita kuti ikwanise kudzikamisa huremu hwengarava, zvichiita kuti ikwanise kuyangarara.
  8. Kana ukasundira bhora rinoyangarara mumvura wobva wariregedza, chii chichaitika?
    • mhinduro: Kana ukasundira bhora rinoyangarara mumvura, uri kuwedzera huwandu hwemvura yarinobvisa, izvo zvinowedzera simba rekuyerera. Paunorisunungura, simba rakawedzerwa rekuyerera richarisundira kumusoro kusvika radzokera panzvimbo yaro yekuenzana.
  9. Chii chinoitika kusimba rinoyerera pachinhu chiri pasi pemvura kana ukachibvisa kubva mumvura yakachena kuenda mumvura ine munyu?
    • mhinduro: Mvura yemunyu ine huremu hwakanyanya kupfuura mvura yakachena. Saka, kana huwandu humwe chete hwabviswa, simba rinoyerera mumvura yemunyu richave rakakura kupfuura mvura yakachena. Saka, chinhu chinogona kuyangarara mumvura ine munyu kupfuura mvura yakachena.
  10. Zvinokwanisika here kuti chinhu chigadzikane pane imwe nzira (semuenzaniso, yakatwasuka) asi chisina kugadzikana pane imwe nzira (semuenzaniso, yakatwasuka) ichiyangarara mumvura?
  • mhinduro: Ehe, kugadzikana kwechinhu chiri kuyangarara kunoenderana nekupararira kwehuremu hwacho kana tichienzanisa nesimba rinoyangarara. Kana pakati pesimba rinokwevera zvinhu pasi riri pamusoro chaipo pepakati pesimba rinoyangarara, chinhu chacho chichagara chakagadzikana. Zvisinei, kana ukachinja mafambiro acho, hukama huripo pakati penzvimbo hunogona kuchinja, zvichikonzera kusagadzikana kwemafambiro iwayo.
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