3 Mienzaniso yemibvunzo yekukweva
1. Chinhu chine huremu hwe1 kg. Kana kukurumidza nekuda kwegiravhiti = 10 m/s2, chinhu chacho chinorema zvakadii?
Kukurukurirana
Zvinozivikanwa :
Huremu hwechinhu (m) = 1 kg
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s2
Akabvunzwa Kurema kwechinhu (w)
Jawab :
Fomura yegiravhiti:
w = mg
Information :
m = huremu (chiyero chepasi rose ikirogiramu, kg yakapfupikiswa)
g = kukurumidza kunokonzerwa negiravhiti (mayuniti epasi rose ari mamita pasekondi imwe chete, akapfupikiswa m/s2)
w = simba rinokwevera pasi (mayuniti epasi rose ari kg m/s2 (anozivikanwawo saNewton)
Kurema kwechinhu chacho ndekwekuti:
w = (1 kg)(10 m/s2) = 10 kg m/s2 = 10 Newton
2. Tarisa mifananidzo (a) na (b) iri pazasi.
(a) Dhirowa vhekitari yegiravhiti yechinhu chacho, mumufananidzo (a).
(b) Dhirowa vhekitari yegiravhiti, chikamu chegiravhiti chakaenzana nendege yakatsveyama uye chikamu chegiravhiti yakatarisana nendege yakatsveyama, mumufananidzo (b)!
Kukurukurirana
Kutungamira kwegiravhiti (w) kwakamira pasi kana kuti pakati penyika.
wx = chikamu chakatambanuka chegiravhiti uye wy = chikamu chakamira chegiravhiti.
3. Kana huremu hwechinhu = 1 kg uye kukurumidza kunokonzerwa negiravhiti = 10 m/s 2 , sarudza (a) hukuru hwesimba rinokwevera pasi (b) hukuru hwechikamu chegiravhiti chesimba rinokwevera pasi chakaenzana nendege yakatsamira uye hukuru hwechikamu chegiravhiti chesimba rinokwevera pasi chakatarisana nendege yakatsamira.
Kukurukurirana
Hukuru hwesimba regiravhiti:
w = mg = (1 kg)(10 m/s2) = 10 kg m/s2 = 10 Newton
Hukuru hwechikamu chesimba rinokwevera pasi rakafanana nendege yakatsamira:
wx = w chivi 30o = (10 N)(0,5) = 5 Newton
Hukuru hwechikamu chesimba rinokwevera pasi rakatarisa kune rakanamira:
Wy = w cos 30o = (10 N)(0,5√3) = 5√3 MaNewton
[Chirungu: Huremu nehuremu - matambudziko nemhinduro ]
