Zvinhu Zvakarurama Zvinofamba
Kufamba chinhu chatinogara tichiona muhupenyu hwezuva nezuva. Bazi refizikisi rinoongorora kufamba rinonzi mechanics. Bazi remakanika rinokurukura kuti chinhu chinofamba sei, pasina kufunga nezvechikonzero chekufamba, rinonzi kinematics . Kusiyana neizvi, bazi remakanika rinokurukura zvinokonzera kufamba uye rinotsanangura kuti nei zvinhu zvichifamba sezvazvinoita rinonzi dynamics. 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 chiri kufamba nepakati kana nzira yacho yakatwasuka. Kana nzira yacho yakakombama, chinhu chacho hachisi kufamba nepakati. Kufamba kwechinhu, kunoonekwa sechikamu, kune divi rimwe chete. Kufamba nepakati 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 chinotevedzera equation y = 8t – t 2 , na y na t mumamita nemasekonzi, zvichiteerana. 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 – t 2
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 t 1 – t 2
B. Chinhu A che t 2 – t 3
C. Chinhu B che t 1 – t 2
D. Chinhu C che t 1 – t 2
E. Chinhu C che t 2 – t 3
Kukurukurirana
Chinhu A: kumhanya kwechinhu kunowedzera ne4 m/s masekondi maviri ega ega kana 2 m/s masekondi ega ega = 2 m/s 2.
Chinhu B: kumhanya kwechinhu kunowedzera ne5 m/s masekondi maviri ega ega kana 2,5 m/s masekondi ega ega = 2,5 m/s 2.
Chinhu C: kumhanya kwechinhu kunoderera ne2 m/s masekondi maviri ega ega kana 1 m/s masekondi ega ega = -1 m/s 2.
Mhinduro chaiyo ndiC.
