1. Cufka shay, m = 10 kg, oo ay taageerto xadhig. Soo hel xiisadda ku jirta xadhigga! g = 10 m/s 2
La yaqaan:
Cufnaanta (m) = 10 kg
Dardargelinta cufisjiidadka awgeed (g) = 10 m/s 2
La Doonayo: Xoogga xiisadda (T)
Xalka:
ΣF y = 0
T – w = 0
T = w
T = mg
T = (10 kg)(10 m/s 2 ) = 100 kg m/s 2
T = 100 Newtons
2. Cufka shaygu waa 10 kg. Soo hel xiisadda ku jirta xarigga….. Dardargelinta cufisjiidadka awgeed = 10 m/s 2.
Solution
La yaqaan:
Cufnaanta (m) = 10 kg
Dardargelinta cufisjiidadka awgeed (g) = 10 m/s 2.
La Doonayo: Xoogga xiisadda (T)
Xalka:
w = miisaanka = mg = (10 kg)(10 m/s2)) = 100 kg m/s2
T 1 = xoogga xiisadda 1
T 1x = qaybta x ee xoogga xiisadda 1 = T 1 cos 45 o = 0.7 T 1
T 1y = qaybta y ee xoogga xiisadda 2 = T 1 sin 45 o = 0.7 T 1
T 2 = xoogga xiisadda 2
T 2x = qaybta x ee xoogga xiisadda 2 = T 2 cos 45 o = 0.7 T 2
T 2y = qaybta y ee xoogga xiisadda 2 = T 2 sin 45 o = 0.7 T 2
Xaaladda dheelitirka ΣF = 0.
dhidibka y:
ΣF y = 0
T 1y + T 2y – w = 0
0.7T 1 + 0.7T 2 – 100 = 0
0.7T 1 + 0.7T 2 = 100 —– isla'egta 1
x dhidibka:
ΣF x = 0
T 2x – T 1x = 0
0.7T 2 – 0.7T 1 = 0
0.7T 2 = 0.7T 1
T 2 = T 1 —– isla'egta 2
Go'aami baaxadda T 1 :
0.7T 1 + 0.7T 1 = 100
1.4T 1 = 100
T 1 = 100 / 1.4
T 1 = 71.4 Newton
T 1 = T 2 sidaas darteed T 2 = 71.4 Newtons
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