Kufamba kwakatwasuka

Zvinhu Zvakarurama Zvinofamba

Kufamba chinhu chatinogara tichiona muhupenyu hwezuva nezuva. Bazi refizikisi rinoongorora kufamba rinonzi makanika. Bazi remakanika rinokurukura kuti chinhu chinofamba sei, pasina kufunga nezvechikonzero chekufamba, rinonzi kinetic energy. kinematicsKusiyana neizvi, bazi remakanika rinoongorora zvikonzero zvekufamba kwechinhu uye rinotsanangura kuti nei zvinhu zvichifamba sezvazviri isimba. Munyaya iyi, chinhu chega chega chinofamba chinoonekwa sekunge chiri chidimbu kana poindi (.). Zvinhu zvinofamba zvinoonekwa semapoindi kuti zvive nyore kuongorora kwedu. Fungidzira kana poindi ichifamba mumutsara wakatwasuka, ipapo nzira yayo ichaumba mutsetse wakatwasuka.

Chinhu chinonzi chinoita kufamba kwakatwasuka Kana nzira yechinhu yakatwasuka. Kana nzira yacho yakakombama, chinhu chacho hachisi kufamba mumutsara wakatwasuka. Kufamba kwechinhu, kunoonekwa sechikamu, kune divi rimwe chete. Kufamba kwedivi rimwe chete kunogona kuitika kwakatwasuka (kwakafanana ne x-axis) kana kwakatwasuka (kwakafanana ne y-axis).

Muenzaniso wezvinetso

1. Mibvunzo yebvunzo dzeNyika dza2017

Tarisa mufananidzo!

Nhambwe huru inofambiswa nechinhu munguva imwe chete…

A. 0 s kusvika 10 s

B. masekondi gumi kusvika makumi maviri

C. masekondi makumi maviri kusvika makumi matatu

D. masekondi makumi matatu kusvika makumi mashanu

E. 50 s kusvika 70 s

Kukurukurirana

Fomura yekureba:

s = vt

Kureba = nzvimbo ine mumvuri.

Daro guru = nzvimbo huru.

A. ½ (10-0)(20-0) = ½ (10)(20) = (5)(20) = 100

B. (20-10)(10-0) + (½)(20-10)(20-10) = (10)(10) + ½ (10)(10) = 100 + (5)(10) = 100 + 50 = 150

C. (30-20)(10-0) = (10)(10) = 100

D. (50-30)(10-0) = (20)(10) = 200

E (70-50)(10-0) + ½ (70-50)(30-10) = (20)(10) + ½ (20)(20) = 200 + (10)(20) = 200 + 200 = 400

Mhinduro chaiyo ndiE.

2. Mibvunzo yebvunzo dzeNyika dza2017

Chidimbu chinofamba mudenga chinogutsa equation y = 8t – t² na y na t mumamita nemasekonzi zvakateerana. Kumhanya kwechinhu pa t = masekondi maviri ndiko…

A. 2 ms^-1

B. 4 ms^-1

C. 8 ms^-1

D. 12 ms^-1

E. 16 ms^-1

Kukurukurirana

y = 8t – t²

v = 8 – 2t

Kumhanya kwechinhu pa t = 2 seconds:

v = 8 – 2t = 8 – 2(2) = 8 – 4 = 4 m/s.

Mhinduro chaiyo ndeiyi B.

3. Mibvunzo yebvunzo dzenyika dzeSMA/MA dzegore ra2017

Tarisa tafura yedata rekumhanya kwezvinhu zvitatu zvinotevera!

Zvichibva patafura, zvinogona kugumiswa kuti chinhu chine kukurumidza kukuru ndeche...

A. Chinhu A che t₁ - t₂

B. Chinhu A che t₂ - t₃

C. Chinhu B che t₁ - t₂

D. Chinhu C che t₁ - t₂

E. Chinhu C che t₂ - t₃

Kukurukurirana

Chinhu A: kumhanya kwechinhu kunowedzera ne4 m/s masekondi maviri ega ega kana 2 m/s masekondi ega ega = 2 m/s².

Chinhu B: kumhanya kwechinhu kunowedzera ne5 m/s masekondi maviri ega ega kana 2,5 m/s masekondi ega ega = 2,5 m/s².

Chinhu C: kumhanya kwechinhu kunoderera ne2 m/s masekondi maviri ega ega kana 1 m/s masekondi ega ega = -1 m/s².

Mhinduro chaiyo ndiC.