Simba remakanika - matambudziko nemhinduro

Simba remakanika - matambudziko nemhinduro

Musimboti wesimba rekushanda nemechanical

1. Chiyero che kukweshana kwekinetic pakati pebhuroko nepasi (μ_k) i0.5. Chii chinonzi kudzingiswa yechinhu/zvinhu? Kuwedzera nekuda kwegiravhiti iri 10 m/s².

Zvinozivikanwa:

Chiyero chekukweshana kwekinetic (μ)_k= = 0.5

Misa yebhuroko (m) = 4 kg

Kukurumidza kunokonzerwa negiravhiti (g) ndeye 10 m/s²

uremu yebhuroko (w) = mg = (4)(10) = 40 Newtons

Kana bhuroko riri padenderedzwa rakatwasuka, simba rakajairika (N) = huremu (w) = 40 Newtons.

Kana bhuroko riri padenderedzwa rakatwasuka, simba rakajairika (N) = huremu (w) = 40 Newtons.

Kumhanya kwekutanga (v)₁) = 5 m/s

Kumhanya kwekupedzisira (v)₂) = 0 m/s

Zvaidiwa: kuchinjika kwechinhu (d) ?

Solution:

Musimboti wesimba rekushanda nemechanical unotaura kuti basa (W) rinoitwa nesimba risingachengetedzi zvinhu zvakafanana nekuchinja kwesimba remechanical rechinhu. Kuchinja kwesimba remechanical = simba rekupedzisira remechanical - simba rekutanga remechanical.

Simba rekukweshana kwekinetic ndiro rimwe remasimba asingachengetedzi uye ndiro chete simba risingachengetedzi rinoita basa pablock.

W = ΔME

f_k d = INI₂ – INI₁

Basa rinoitwa ne kinetic friction force:

W = f_k d = (μ_k)(N)(d) = (0.5)(40)(d) = 20 d

Kuchinja kwesimba remakanika:

ΔME = INI₂ – INI₁ = (KE + PE)₂ – (KE + PE)₁

Chinhu chinofamba nenzira yakatwasuka uye hapana shanduko yehurefu (Δh = 0) saka hapana shanduko ye simba regiravhiti (ΔPE = PE₂ - PE₁ Saka shanduko ye michina simba zvinongosanganisira kuchinja kwe simba reinetic.

ΔME = KE₂ – KUNA₁ = ½ mv₂² – ½ mv₁² = ½ m (v)₂² - v₁²)

ΔME = ½ (4)(0² - 5²) = (2)(25) = 50

Kubviswa kwebhuroko:

W = ΔME

masekondi makumi maviri = makumi mashanu

s = 50 / 20

s = mamita gumi

Musimboti we kuchengetedzwa kwesimba remakanika

2. Chinhu A nechinhu B zvine huremu hwakafanana. Chinhu A chinodonha kubva pahurefu hwemamita h uye chinhu B chinodonha kubva pahurefu hwemamita maviri. Kana chinhu A chikarova pasi pa vm/s, saka chii chinonzi kinetic energy yechinhu B pachinorova pasi.

Solution:

Kumhanya kwekupedzisira kwechinhu B kana chichidonha kubva pakakwirira kwemaawa maviri:

v² = 2 g (maawa maviri) = 4 gh

Simba rekufamba kwechinhu B:

KE_B = ½ mv² = ½ m (4 gh) = 2 mgh —– equation 1

Simba rekutanga remuchina rechinhu B = simba regiravhiti = mg h.

Simba rekupedzisira remuchina rechinhu B = simba remuchina = ½ mv².

Nheyo yekuchengetedza simba remakanika:

mgh = ½ mv²

nekuti mgh = ½ mv² ipapo tinogona kuchinja mgh muchiyero 1 ne ½ mv².

Simba rekufamba kwechinhu B = 2 mgh = 2(½ mv)²) = mv²

3. Chinhu chinodonha chisina kukwira kubva pakakwirira kwemamita makumi maviri. Kumhanya kunokonzerwa negiravhiti i10 m/s. Chii chinoita kuti chinhu chiwedzere kumhanya kwemamita gumi nemashanu kubva pasi?

Solution:

Simba rekupedzisira remakanika = simba rekutanga remakanika

Simba remagetsi pachikamu chechipiri = kuchinja kwesimba regiravhiti kusvika pamamita mashanu.

4. Bhokisi rinoburitswa kubva pamusoro penzvimbo yakatsetseka. Bhokisi rinomhanya zvakadii kana rasvika pasi?

Solution:

Simba rekutanga remakanika = simba regiravhiti = mgh = m (10)(5) = mamita makumi mashanu

Simba rekupedzisira remakanika = simba rekinetic = 1/2 mv²

Nheyo yekuchengetedza simba remakanika, inoti simba rekutanga remakanika = simba rekupedzisira remakanika.

ME_o = INI_t

50 m = 1/2 mv²

50 = 1/2 v²

2 (50) = v²

100 = v²

v = 10 m/s

5.

Bhokisi rine huremu hwe m-kg rakaburitswa kubva pakukwirira kwemamita h pamusoro pevhu, sezvakaratidzwa mumufananidzo uri pazasi. Sarudza chiyero chesimba rinogona kugoneka kune simba rekinetic (KE) panzvimbo ye M.

Solution:

Simba regiravhiti rinokwevera zvinhu panzvimbo M:

PE_M = mg (maawa 0.3)

Simba rekinetic panzvimbo m = shanduko yesimba regiravhiti kusvika pa h-0.3h = 0.7h

KE_M = PE = mg (maawa 0.7)

Chiyero chesimba regiravhiti kune simba rekinetic panzvimbo M:

PE_M : KUNA_M

mg (0.3 maawa): mg (0.7 maawa)

0.3: 0.7

3: 7

6. Kana PE_Q uye KE_Q vane simba rinogona kushandiswa uye simba rekufamba kwenguva pa Q (g = 10 m/s)²), wobva wawedzera PE_Q : KUNA_Q =…

Solution:

Simba regiravhiti rinokwevera zvinhu pasi panotangira Q:

PE_Q = mgh = (m)(10)(1.8) = mamita gumi nemasere

Simba rekinetic papoindi Q = shanduko yesimba regiravhiti kusvika pa5-1.8 = 3.2 metres

KE_Q = PE = mgh = m (10) (3.2) = 32 m

Chiyero chesimba regiravhiti kune simba rekinetic papoindi Q:

PE_Q : KUNA_Q

18 m : 32 m

18: 32

9: 16

1. Chii chinonzi simba remakanika? mhinduro: Simba remakanika ihuwandu hwesimba rinogona kuitika uye simba rekinetic muhurongwa. Rinomiririra huwandu hwesimba rose rine chekuita nekufamba uye chinzvimbo chechinhu.
2. Simba remagetsi rakasiyana sei nesimba rinogona kushandiswa? mhinduro: Kinetic energy isimba rekufamba, nepo potential energy iri simba rinochengetwa nekuda kwenzvimbo kana magadzirirwo echinhu. Semuenzaniso, mota inofamba ine kinetic energy, nepo spring yakatambanudzwa kana chinhu chiri pakakwirira mumunda wegravitational chine potential energy.
3. Simba remakanika rinogara richichengetedzwa here? mhinduro: Muhurongwa hwakavharwa, hwakavharwa husina simba rekunze, simba remuchina rinochengetedzwa. Zvisinei, mumamiriro ezvinhu chaiwo, mamwe marudzi esimba akadai sesimba rekupisa kana reruzha anogona kushanda nekuda kwekukweshana kana mamwe masimba asiri ekuchengetedza, zvichikonzera kudzikira kwesimba rese remuchina.
4. Kuchengetedza simba remakanika kunobatsira sei mukugadzirisa matambudziko? mhinduro: Kana simba remakanika richichengetwa muhurongwa (pasina masimba asingachengetedzi semafungiro), simba rese pakutanga rakaenzana nesimba rese riri kumagumo. Iyi nheyo inotibvumira kubatanidza simba remagetsi neremagetsi panguva dzakasiyana, zvichiita kuti kugadzirisa matambudziko kuve nyore.
5. Chii chinoitika kusimba remuchina rebhora kana rikakandwa mudenga romira kwechinguva risati radzika? mhinduro: Bhora parinokwira, simba raro rekufamba rinoderera ukuwo simba raro rekufamba richikwira. Pakukwira, simba raro rese rekufamba rinenge riri simba raro rekufamba. Parinodzika, maitiro aya anochinja-chinja. Mumamiriro ezvinhu akanaka pasina kudzivirira mhepo, simba rese rekufamba bhora rinoramba riripo murwendo rwaro rwese.
6. Chinhu chinogona kuva nesimba rekufamba nemhepo uye simba rekufamba nemhepo panguva imwe chete here? mhinduro: Ehe, chinhu chinogona kuva nemarudzi ese esimba panguva imwe chete. Semuenzaniso, pendulum iri pakati pekutenderera kwayo ine simba rekufamba nekuda kwekufamba kwayo uye simba rinogona kuitika nekuda kwekukwirira kwayo pamusoro penzvimbo yayo yakaderera.
7. Roller coaster inoratidza sei kuchengetedza simba remakanika? mhinduro: Roller coaster inotanga nesimba rinogona kukwira panzvimbo yayo yepamusoro. Painodzika, simba iri rinoshanduka kuita simba rekufamba, zvichiita kuti coaster imhanye. Painokwira zvakare, simba rekufamba rinoderera nepo simba rinogona kukwira. Tisingateereri kukweshana uye kuramba mhepo, simba rese remuchina rinoramba rakafanana.
8. Ndezvipi zvinhu zvinogona kukonzera kurasikirwa nesimba remakanika mumasisitimu chaiwo? mhinduro: Kukweshana, kuramba mhepo, uye kugadzirwa kweruzha zvimwe zvezvinhu zvinogona kukonzera kurasikirwa nesimba mumasisitimu chaiwo. Simba hariparadzwe (nekuda kwemutemo wekuchengetedza simba) asi rinoshandurwa kuita mamwe marudzi akadai sekupisa kana ruzha.
9. Chii chiri hukama huripo pakati pebasa nesimba remakanika? mhinduro: Basa rinoitwa pahurongwa nemasimba ekunze rinogona kutungamira kuchinjwa kwesimba remakanika rehurongwa. Mumasvomhu, basa rakaenzana nekuchinja kwesimba remakanika.

10. Kana simba regiravhiti richienzaniswa nepfungwa yekunongedzera, tingaenzanisa sei shanduko dziri mariri nguva dzose? mhinduro: Kunyange zvazvo kukosha kwakakwana kwesimba regiravhiti kuchienderana nesarudzo yenzvimbo yekunongedzera, shanduko musimba resimba (senge kana chinhu chasimudzwa kana kudzikiswa) dzinogara dzichienderana pasinei nereferensi. Saka, tinowanzo tarisa shanduko musimba resimba pane kukosha kwakakwana.