Basa reNet Simba regiravhiti Simba reKinetic - Matambudziko neMhinduro

4 Basa reNet Simba regiravhiti Simba reKinetic - Matambudziko neMhinduro

1. Chinhu chinorema 5 kg chiri pakakwirira mamita gumi kubva pasi. Kuwedzera nekuda kwegiravhiti iri 10 m/s²Chii chinonzi basa chakaitwa pachinhu ichi kuti chikwidzwe kumusoro kusvika pakakwirira mamita gumi nemashanu kubva pasi?

Zvinozivikanwa:

Misa yechinhu (m) = 5 kg

Kureba (h) = mamita mashanu

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Kuda: Basa rakaitwa pachinhu ichi kuti chikwire kumusoro kusvika pakakwirira mamita gumi nemashanu kubva pasi.

Solution:

W = F d = wh = mgh

W = basa, F = simba, d = kudzingiswa, w = uremu, h = kureba, m ​​= huremu, g = kukurumidza nekuda kwegiravhiti

Basa rakaitwa pachinhu ichi:

W = mgh = (5 kg)(10 m/s²)(10 m) = 500 kg m²/s² = 500 Joule

2. Chinhu chinorema 2 kg chinofamba panzvimbo yakatsetseka yakatwasuka nekumhanya kwe2 m/s. Kana kumhanya kwekupedzisira kwechinhu chiri 5 m/s. Basa rakaitwa pachinhu chacho nderei?

Zvinozivikanwa:

Huremu hwechinhu (m) = 2 kg

Kumhanya kwekutanga (v)_o) = 2 m/s

Kumhanya kwekupedzisira (v)_t) = 5 m/s

Kuda: Basa rakaitwa pachinhu chacho

Solution:

The musimboti wesimba rekushanda-kinetic inotaura kuti basa remambure rinoitwa pachinhu rakaenzana nekuchinja kwechinhu chacho simba reinetic.

W = ΔKE = KE₂ – KUNA₁ = 1/2 mv_t² – 1/2 mv_o² = 1/2 m (v)_t² - v_o²) = 1/2 (2)(5²-2²) = (1)(25-4) = 21 Joule

3. Chinhu chine huremu hwe10-kg pakutanga chakazorora pasi rakatsetseka. Mushure mekusundirwa mumasekonzi matatu, chinhu chacho chakamhanya ne2 m/s²Chii chakaitwa pachinhu chacho?

Zvinozivikanwa:

Huremu (m) = 10 kg

Kumhanya kwekutanga (v)_o) = 0 (pakutanga pakuzorora)

Nguva yepakati (t) = masekondi gumi nemashanu

Kukurumidzisa (a) = 2 m/s²

Zvaidiwa: Basa (W)

Solution:

Kutanga, tsvaga daro uchishandisa equation ye kukurumidza nguva dzose kufamba.

d = v_o t + ½ pa² = (0)(3) + ½ (2)(3)²

d = 0 + (1)(9) = 9

Basa rakaitwa pachinhu ichi:

W = F s = (ma)(d) = (10)(2)(9) = 180 Joules

4. Bhokisi rine huremu hwe1.5 kg rinokwidziridzwa kumusoro nesimba risingaperi F = 15 N panzvimbo yakatsamira sezvakaratidzwa mumufananidzo uri pazasi. Kumhanya kunokonzerwa negiravhiti i10 m/s² uye hapana kupopotedzana pakati pemabhuroko uye ndege yakatsamiraChii chinonzi network work yakaitwa pachinhu chacho?

Zvinozivikanwa:

Huremu hwebhuroko (m) = 1.5 kg

Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²

Kurema kwebhuroko (w) = mg = (1.5)(10) = 15 Newtons

Simba (F) = 15 Newton

Kuda: Basa reNet rinoitwa pachinhu chacho

Solution:

Pane masimba maviri anoshanda pabhuroko. Chekutanga, simba rakafanana nekufamba kwebhuroko iri iForce F. Chechipiri, chikamu chakatambanuka chehuremu hwebhuroko (w)._x).

Basa rinoitwa nechisimba (F):

W₁ = F s = (15 N)(2 m) = 30 N m = 30 Joules

Basa rinoitwa nechikamu chakatarwa chehuremu (w)_x):

W₂ = w_x s = (w chivi 30^o)(2 m) = (15 N)(1/2)(2 m) = 15 N m = 15 Joules

Basa re network rakaitwa pachinhu ichi:

W_mambure =W₁ - W₂ = 30 J – 15 J = 15 Joule

1. Chii chinonzi dzidziso yesimba rebasa maererano nebasa remagetsi uye simba remagetsi?
   • mhinduro: Dzidziso yesimba rekushanda inotaura kuti basa rese rinoitwa pachinhu rakaenzana nekuchinja kwesimba rayo rekufamba. Pamasvomhu: Wnet​=ΔKE.
2. Kana ukasimudza chinhu kusvika pakakwirira wobva wachibata ipapo, unenge uchiita basa rakawanda sei pachinhu chacho uchichibata chisina kumira?
   • mhinduro: Paunenge wakabata chinhu chisina kumira, unenge usingashande zvachose nekuti hapana chinotamiswa. Basa rinotsanangurwa sesimba rinotora nguva yekutamiswa kwesimba, saka kusatamiswa kwesimba zvinoreva kuti hapana basa.
3. Chii chinonzi simba regiravhiti rechinhu chiri pasi?
   • mhinduro: Simba regiravhiti rechinhu chiri pasi rinowanzoonekwa se zero. Simba regiravhiti regiravhiti rinoenderana, uye nhanho yepasi ipfungwa yakajairika.
4. Simba rekinetic rechinhu rinoshanduka sei kana kumhanya kwaro kwakapetwa kaviri?
   • mhinduro: Kinetic energy inoenderana ne square of velocity. Kana velocity yechinhu ikapetwa kaviri, kinetic energy yayo ichawedzera nekamwe chete kana kane.
5. Simba rekukwevera rechinhu chinodonha rinosvika rini?
   • mhinduro: Simba rekukwevera simba rechinhu chinodonha rinosvika padanho repamusoro chisati chatanga kudonha, kureva kuti, kana chiri panzvimbo yacho yepamusoro-soro pamusoro penyika (kana nzvimbo yekunongedzera).
6. Kana pasina kudzivirira kwemhepo, chii chingataurwa nezvehukama huripo pakati pesimba rinogona kurasika nesimba rekufamba rinowanikwa nechinhu chinodonha zvakasununguka?
   • mhinduro: Kana pasina simba rekudzivirira mhepo, simba rinogona kurasikwa nechinhu chinodonha zvakasununguka richaenzana nesimba rekufamba kwaro. Izvi zvinokonzerwa nekuchengetedzwa kwesimba remagetsi.
7. Chii chinoitika kune simba rinokwevera zvinhu pasi kana rikakwira kaviri kupfuura kukwirira kwaro kwekutanga?
   • mhinduro: Simba rekukwevera zvinhu pasi rinoenderana nekukwirira. Kana chinhu chikasimudzwa kusvika pakukwirira kwacho kwepakutanga kaviri, simba racho rekukwevera zvinhu pasi rinopetwa kaviri.
8. Basa remambure rinoitwa rini pane chinhu chine zero?
   • mhinduro: Basa rinoitwa pachinhu harisi zero kana basa rose rinoitwa nemasimba ese ari kushanda pachiri rikasvika zero, kana zvakaenzana, kana pasina shanduko musimba remagetsi rechinhu chacho.
9. Kana chinhu chiri kufamba nespeed isingachinji, chii chingataurwa nezvebasa remambure rinoitwa pachiri pamusoro pedaro rakati?
   • mhinduroKana chinhu chichifamba nespeed isingachinji, zvinoreva kuti hapana acceleration, saka hapana simba rinoshanda pachiri. Saka, basa rinoitwa pachinhu chacho chero padaro richava zero.

10. Sei chinhu chiri panzvimbo yakakwirira chiine simba guru regiravhiti kunyangwe chiri kure nepakati peNyika?

    • mhinduro: Simba rekukwevera zvinhu pasi rinobva panzvimbo yechinhu kana tichienzanisa nenzvimbo yekunongedzera zvinhu (kazhinji pamusoro pePasi) uye simba rekukwevera zvinhu pasi rinoshanda pachiri. Chinhu chiri panzvimbo yakakwirira chiri pamusoro penzvimbo yekunongedzera zvinhu, zvinoreva kuti chafamba chinopesana nesimba rekukwevera zvinhu panzvimbo iyoyo. Nekuda kweizvozvo, chine simba rakachengetwa nekuda kwenzvimbo yacho, uye simba iri rakachengetwa ndiro simba rayo rekukwevera zvinhu pasi.