Muenzaniso wemibvunzo yeImpulse

Mienzaniso mina yeMibvunzo yeKufungidzira

1. Bhora rine huremu hwe 0,5 kg rinodonha zvakasununguka kubva pakukwirira kwe h.₁ = 7,2 m pamusoro pepasi uye inosvetuka kusvika pakukwirira kwe h₂ = 3,2 m. Kana kukurumidza nekuda kwegiravhiti nyika = 10 ms^-2, chido chekubata bhora ndicho...

A. 2,0 Ns

B. 3,0 Ns

C. 10 Ns

D. 40 Ns

E. 80 Ns

Kukurukurirana

Zvinozivikanwa :

Huremu hwebhora (m) = 0,5 kg

Kureba kwebhora remahara rinodonha (h)₁) = 7,2 mamita

Kureba kwebhora rinosvetuka (h)₂) = 3,2 mamita

Kukurumidza kwesimba regiravhiti repasi (g) = 10 m/s²

Akabvunzwa : Kufungidzira kuri kuita bhora

Jawab :

Kumhanya kwebhora nguva pfupi isati yarova (v)_o)

Verenga kumhanya kwebhora usati warova uchishandisa fomura yekudonha yakasununguka. Zvichienderana nekukwirira (h) = 7,2 metres, kumhanyisa nekuda kwegiravhiti (g) = 10 m/s² uye ndakakumbira kumhanya kwekupedzisira nguva pfupi isati yasvika pasi, saka shandisa fomura yacho v² = 2 gh

v_o² = 2(10)(7,2) = 144

v_o = 2(10)(7,2) = 12 m/s

Kumhanya kwebhora risati rarova (v)_o) iri -12 m/s. Chiratidzo chekuramba chiripo chinongoratidza gwara chete.

Kumhanya kwebhora mushure mekuroverana (v)_t)

Verenga kumhanya kwebhora mushure mekurovera uchishandisa fomura yekufamba wakamira uchikwira. Zvichienderana nekukwirira (h) = 3,2 metres, kumhanyisa nekuda kwegiravhiti (g) = -10 m/s², kumhanya kwekupedzisira pakukwirira kwakanyanya (v)_t²) = 0 uye kumhanya kwekutanga kunobvunzwa pakarepo mushure mekudonha pasi, saka shandisa fomura v_t² =v_o² + 2 gh

v_t² =v_o² + 2 gh

0 = v_o² + 2 (-10)(3,2)

v_o² = 64

v_o = √64 = 8 m/s

Kumhanya kwebhora mushure mekuroverana (v)_t) iri 8 m/s

Kufungidzira kuri kuita bhora (I)

Impulse inoverengwa uchishandisa fomura ye impulse-momentum theorem.

Kukurumidza (I) = kuchinja kwesimba (Δp)

Ini = m (v)_t - v_o) = (0,5)(8-(-12)) = (0,5)(8 + 12) = 0,5(20) = 10 Masekondi eNewton

Mhinduro chaiyo ndiC.

2. Bhora reping pong rine huremu hwemagiramu mashanu rinodonha zvakasununguka kubva pahurefu hwakati (g = 10 ms).^-2). Kana bhora richirova pasi, kumhanya kwaro kuri 6 ms.^-1 uye pakarepo mushure mekurovera pasi bhora rinosvetuka kumusoro nekumhanya kwe4 ms^-1. Hukuru hwepfungwa dzinoita pabhora ndi...

A. 0,50 Ns

B. 0,25 Ns

C. 0,10 Ns

D. 0,05 Ns

E. 0,01 Ns

Kukurukurirana

Zvinozivikanwa :

Huremu hwebhora (m) = magiramu mashanu = 0,005 kg

Kumhanya kwebhora nguva pfupi isati yasvika pasi (v)_o) = -6 m/s

Kumhanya kwebhora mushure mekunge rarova pasi (v)_t) = 4 m/s

Kumhanya kwakanaka uye kusina kunaka zvinoreva kuti bhora rakananga kumhanya kwaro kana kuti bhora rakananga kufamba kwaro risati rasangana kunopesana nekwakananga kufamba kwaro mushure mekusangana.

Akabvunzwa : Kufungidzira (I)

Jawab :

Dzidziso yeImpulse-momentum Inotaura izvozvo impulse (I) zvakafanana ne shanduko mukufambira mberi (Δp).

I = Δp = mv_t - mv_o = m (v)_t - v_o)

Ini = (0,005)(4 – (-6)) = (0,005)(4 + 6) = (0,005)(10) = 0,05 Newton second

Mhinduro chaiyo ndiD.

3. Bhora rine huremu hwemagiramu makumi maviri rinokandwa nespeed ye v₁ = 4 ms^-1 kuruboshwe. Mushure mekurova rusvingo bhora rinosvetuka nekumhanya kwev₂ = 2 ms^-1 kurudyi. Hukuru hwepfungwa inoburitswa ndi….

A. 0,24 Ns

B. 0,12 Ns

C. 0,08 Ns

D. 0,06 Ns

E. 0,04 Ns

Kukurukurirana

Zvinozivikanwa kuti:

Huremu hwebhora (m) = magiramu mashanu = 0,020 kg

Kumhanya kwebhora risati raroverana (v)_o) = -4 m/s (kuruboshwe)

Kumhanya kwebhora mushure mekurovera (v)_t) = +2 m/s (kurudyi)

v_o kupiwa chiratidzo chekuramba kusiyanisa divi rayo kubva pa v_t.

Akabvunzwa: kupomba

Mhinduro:

Kukurumidza (I) = kuchinja kwesimba (Δp) = mv_t - mv_o

Kufungidzira (I) = m (v)_t - v_o) = 0,02 (2 – (-4))

Kufungidzira (I) = 0,02 (2 + 4) = 0,02 (6)

Kufungidzira (I) = 0,12 masekondi eNewton.

Mhinduro chaiyo ndeiyi B.

4. Bhora retenesi rinorema magiramu zana rinodonhedzwa pasi kubva pakukwirira kwemasendimita makumi maviri pasina kumhanya kwekutanga. Mushure mekurovera pasi, bhora rinosvetuka nekumhanya kwe1 m/s.^-1 uye (g = 10 ms^-2Kuchinja kwesimba rinoonekwa nebhora kuri…

A. 0,1 Ns
B. 0,3 Ns
C. 0,5 Ns
D. 0,8 Ns
E. 0,9 Ns

Kukurukurirana
Zvinozivikanwa :
Huremu hwebhora (m) = magiramu mashanu = 0,1 kg
Kureba (h) = 20 cm = 0,2 metres
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s²
Kumhanya kwebhora mushure mekunge rarova pasi (v)_t) = 1 m/s
Akabvunzwa : kuchinja kwesimba rebhora
Jawab :
Kumhanya kwebhora risati rarova (v)_o)
Verenga kumhanya kwebhora usati warova uchishandisa fomura yekudonha kwemahara. Zvichienderana nekukwirira kwekudonha kwebhora kwemahara (h) = 0,2 metres, kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s² uye ndakabvunza kumhanya kwebhora kana rarova pasi, saka fomura yacho inoshandiswa v² = 2 gh
v² = 2 (10)(0,2) = 4
v= √4 = -2 m/s
Inopiwa chiratidzo chekusateerera nekuti bhora richifamba risati rasangana nepasi rinopesana nekwarakananga bhora richifamba mushure mekusangana nepasi.
Kuchinja kwesimba rebhora (Δp)
Δp = mv_t - mv_o = m (v)_t - v_o)
Δp = (0,1)(1 – (-2)) = (0,1)(1 + 2) = (0,1)(3) = 0,3 Newton Second
Mhinduro chaiyo ndeiyi B.

Kwakabva mubvunzo:

Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa