3 su'aalood oo ku saabsan isla'egta xoogga caadiga ah
1. Balooggu wuxuu leeyahay miisaan dhan 5 kg. Haddii g = 10 m/s 2 , go'aami:
a) miisaanka baloogga
b) xoogga caadiga ah haddii baloogga la dhigo meel siman
c) xoogga caadiga ah haddii balooggu ku tiirsan yahay diyaarad janjeerta oo sameysa xagal 30 o ah oo u jeeda dhinaca toosan
La yaqaan
Cufka baloogga (m) = 5 kg
Dardargelinta cufisjiidadka awgeed (g) = 10 m/s 2
La Rabay: w, N diyaaradda saaran iyo N oo ku taal tiir-jaran
Solution:
a) Miisaanka alwaaxa
w = mg = 5 (10) = 50 Newton
b) Xoogga caadiga ah haddii balooggu uu ku jiro meel siman
N = w = 50 Newton
c) Xoogga caadiga ah haddii balooggu uu ku jiro meel janjeerta
N = w y = w cos θ = 50 (cos 30) = 50 (½ √3) = 25√3 Newtons
2. Tirtire 120 garaam ah ayaa si toosan loogu riixaa looxa iyadoo leh xoog dhan 15 N. Waa maxay xoogga caadiga ah ee ku shaqeeya tirtiraha?
Known:
Cufnaanta (m) = 120 garaam = 0.12 kg
Xoogga (F) = 15 Newton
La Doonayo: Awood caadi ah
Solution:
Xoogga caadiga ah = riixid = 15 Newtons
3. Biyaha dhalada ku jira ee weli ku jira sanduuqa waxaa lagu jiidayaa xoog F = 200 N ah kaas oo sameeya xagal 37 o ah oo leh jiif. Sin 37 o = 0.6. Cufnaanta kartoonka iyo waxa ku jira waa 20 kg. Haddii isku-dhafka isku-dhafka is-dhexgalka ee dhulka uu yahay 0.5 iyo isku-dhafka isku-dhafka ee dhulka uu yahay 0.2, go'aami xoogga caadiga ah ee ka shaqeeya kartoonka.
La yaqaan
Xoogga jiidista (F) = 200 N
Dem 37 = 0,6
Fy = F dembiga 37 = (200) (0,6) = 120 N
Cufka kartoonka (m) = 20 kg
Miisaanka kartoonka (w) = mg = (20)(10) = 200 N
La Raadinayo: Xoog caadi ah oo ku yaal kartoonka (N)
Solution:
Xisaabi xoogga caadiga ah adoo isticmaalaya qaacidada xoogga caadiga ah:
N = w – F y = 200 – 120 = 80 Newtons
