Simba rekushanda nesimba Simba risingachengetedzi kufamba mundege yakatsamira nekukakavadzana - Matambudziko nemhinduro

2 Musimboti wesimba rekushanda Simba risingachengetedzi Kufamba mundege yakatsamira nekukakavadzana - Matambudziko nemhinduro

1. Bhokisi rinotsvedza pasi ndege yakatsamira nekukweshana. Chii chinonzi bhokisi velocity bhokisi rinorova pasi riini? Chiyero che kukweshana kwekinetic i0.4. Kukurumidza kwesimba nekuda kwegiravhiti i10 m/s².

Zvinozivikanwa:

Kureba kwekutanga (h)_o) = 6 m

Kureba kwekupedzisira (h)_t) = 0 m

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

Kukweshana kwekinetic (μ)_k= = 0.4

Kuwedzera nekuda kwegiravhiti (g) = 10 ms^-2

cos θ = adj/hyp = 8/10

Chikamu chakamira che uremu = w_y = w cos θ = mg cos θ = m (10) (8/10) = m (10) (4/5) = m (40/5) = 8 m

The simba remazuva ose = N = w_y = 8 XNUMX m

Simba rekukweshana kwekinetic = f_k = μ_k N = μ_k w_y = (0.4)(8 m) = 3.2 m

Zvaidiwa: Kumhanya kwekupedzisira (v)_t)

Solution:

Musimboti wesimba rekushanda nemechanical unotaura kuti basa rinoitwa nemasimba asingachengetedzeki anoshanda pachinhu rakaenzana nekuchinja kwese kwesimba rekinetic nerinogona kushandiswa.

W_nc = ΔEM

W_nc = ΔEK + ΔEP

W_nc = Basa rinoitwa nechisimba chisiri chekuchengetedza, ΔEM = Kuchinja mu michina simba, ΔEK = Kuchinja kwesimba rekinetic, ΔEP = Kuchinja kwesimba rinogona kushandiswa.

Shanduko mu simba reinetic :

ΔEK = 1/2 m (v)_t² - v_o²) = 1/2 m (v)_t² – 0) = 1/2 mv_t²

Shanduko mu simba rinobvira :

ΔEP = mg (h)_t - h_o) = m (10)(0-6) = m (10)(-6) = – 60 m

Basa rakaitwa nemauto yekukweshana kwekinetic:

W_nc = – f_k s = – (3.2 m)(10) = – 32 m

Chiratidzo chekudzima chinoratidza kuti basa rinoitwa nesimba rekukweshana kwekinetic pablock harina kunaka.

Sarudza kumhanya kwekupedzisira (v)_t):

W_nc = ΔEK + ΔEP

– 32 m = 1/2 mv_t² - 60 m

– 32 m = m (1/2 v)_t² - 60)

– 32 = 1/2 v_t² - 60

– 32 + 60 = 1/2 v_t²

28 = 1/2 v_t²

2 (28) = v_t²

56 = v_t²

v_t = √4.14

v_t = 2√14 ms^-1

2.

Bhurukwa rinotsvedza pasi rakarerekera richikweshana. Kumhanya kwekupedzisira kwebhurukwa parinorova pasi i10 m/s²Kana simba rekukweshana riri 2 N uye kukwidza simba nekuda kwegiravhiti kuri 10 m/s²H inoreba sei?

Zvinozivikanwa:

Huremu hwebhuroko (m) = 1 kg

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

Kumhanya kwekupedzisira (v)_t) = 10 ms^-1

Kureba kwekutanga (h)_o) = h

Kureba kwekupedzisira (h)_t= = 0

Simba rekukweshana kwekinetic (f)_k) = 2 N

Kukurumidza kunokonzerwa negiravhiti (g) = 10 ms^-2

Zvaidiwa: Urefu (h)

Solution:

Basa rinoitwa nesimba rekukweshana kwekinetic:

W_nc = – f_k d = – (2)(15) = – 30

Chiratidzo chekudzima chinoratidza kuti basa rinoitwa nesimba rekukweshana kwekinetic pablock harina kunaka.

Kuchinja kwesimba rekinetic:

ΔEK = 1/2 m (v)_t² - v_o²) = 1/2 (1)(10² – 0) = 1/2 (10)²) = 1/2 (100) = 50

Kuchinja kwesimba rinogona kushandiswa:

ΔEP = mg (h)_t - h_o) = (1)(10)(0-h) = (10)(-h) = -10 maawa

Kuenzanisa kwenheyo yesimba rekushanda-mechanical:

W_nc = ΔEK + ΔEP

– 30 = 50 – 10 maawa

Maawa gumi = 50 + 30

10 maawa = 80

h = 80/10

h = mamita mashanu

1. Chii chinonzi musimboti wekushanda nesimba?
   • Pindura: Musimboti wesimba rekushanda unotaura kuti basa rinoitwa pachinhu rakaenzana nekuchinja kwesimba racho rekufamba. Panyaya yemasvomhu, $W=\Delta KE$, apo $W$ basa rapera uye $\Delta KE$ ndiko kuchinja kwesimba rekinetic.
2. Simba risingadyidzani netsika dzekuchengetedza zvinhu rakasiyana sei nesimba risingadyidzani netsika dzekuchengetedza zvinhu?
   • Pindura: Simba risingachengetedzi, sekukweshana, rinoguma nekurasikirwa nesimba remuchina kubva muhurongwa, kazhinji muchimiro chekupisa. Kusiyana neizvi, masimba anochengetedza, senge simba rinokwevera pasi kana simba rechitubu, haaparadzi simba remuchina asi anogona kurishandura pakati pesimba rinogona kugoneka uye simba rekinetic mukati mehurongwa.
3. Kukweshana kunokanganisa sei basa rinoitwa pachinhu chiri kufamba chakarerekera?
   • Pindura: Kukweshana kunoshanda nenzira yakatarisana nekufamba kwechinhu. Izvi zvinoreva kuti kukweshana kunoita basa rekusashanda zvakanaka pachinhu, zvichideredza simba rayo rekufamba kana kuwedzera huwandu hwebasa rekunze rinodiwa kuti chikwire kumusoro.
4. Sei simba ringangoshandiswa nechinhu risingachinji nekuda kwemasimba asingachengetedzi?
   • Pindura: Simba rinogona kushandiswa rinobatanidzwa nemasimba anochengetedza, uye shanduko yaro inoenderana nenzvimbo dzekutanga nedzekupedzisira chete, kwete munzira yatorwa. Masimba asingachengetedze anogona kushandura simba rekufamba kwechinhu asi haana simba rinoenderana naro.
5. Kona yekurerekera inokanganisa sei kufamba kwechinhu chiri mundege yakarerekera nekukweshana?
   • Pindura: Kana kona yekurerekera yakakura, chikamu chesimba rinokwevera pasi chinoshanda pamwe chete nendege chinokurawo. Izvi zvinoita kuti chinhu chiome kuzorora kana kufamba mundege, uye zvive nyore kumhanyisa pasi. Kukweshana kunoita kuti chisafambise kufamba uku, asi mhedzisiro yacho inova isina kukosha zvakanyanya sezvo kona ichiwedzera.
6. Sei zvinhu zvisingakurumidzi kufamba-famba zvisina mugumo padivi rakarerekera nekukweshana?
   • Pindura: Nekuda kwekuvapo kwekukweshana, chinhu chichifamba, rimwe simba regiravhiti rinoshandurwa kuita kupisa. Pakupedzisira, simba rinobva pakukweshana rakafanana nendege richaenzaniswa nesimba rekukweshana, uye chinhu chichafamba nekumhanya kwakasimba kana kuti kuzorora.
7. Basa rakaitwa nemauto asingachengetedze chitendero rinogona kudzoserwa here?
   • Pindura: Basa rinoitwa nemasimba asingachengetedzeki rinowanzo shandurwa kuita mhando dzesimba dzakadai sekupisa, izvo zvinowanzova zvakaoma kushandura kuti rive simba rinobatsira remakanika. Muzviitiko zvakawanda, simba iri rinoonekwa se "rakarasika" kuhurongwa.
8. Chii chinosarudza hukuru hwesimba rekukweshana riri mundege yakatsamira?
   • Pindura: Simba rekukweshana riri mudenga rakarerekera rinotsanangurwa nesimba rakajairika (rakamira) uye chiyero chekukweshana pakati penzvimbo. Rinopihwa na ffriction​=μ×fnormal​, apo $\mu$ ndiyo coefficient yekukweshana.
9. Sei simba rinogona kutaurwa se zero pane dzimwe nzvimbo dzekutarisa?
   • Pindura: Simba rinogona kushandiswa muchiyero chepakati. Nekutsanangura nzvimbo yekunongedzera apo simba rinogona kushandiswa riri zero, zvinopa hwaro hwakasimba hwekuverenga shanduko musimba rinogona kushandiswa munzvimbo dzakasiyana-siyana zvichienderana nereferensi iyoyo.
10. Kufamba kwechinhu chiri mudenga rakarerekera kwaizochinja sei kana pasina kukweshana?

• Pindura: Pasina kukweshana, simba rega rinoshanda pachinhu chiri mundege ndiro chikamu chegiravhiti chakaenzana nekurerekera. Nekuda kweizvozvo, chinhu chacho chaizokurumidza kudzika mundege nekuda kwesimba iri chete uye hachisviki kumhanya kwakafanana kunze kwekunge chashandiswa nerimwe simba rekunze.