Bantuin jawab yaa kakak

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Diket :
massa benda A lebih kecil dari benda B, mA < mB
mA = 2 kg → wA = mA.g = 2. 10 = 20 N
percepatan gravitasi, g = 10 m/s²
tegangan tali, T1 = 24 N
massa katrol, m = 2 kg

Tanya :
Tegangan Tali, T2 = __?

Jawab :

Step 1
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Tinjau balok A bergerak translasi
ΣF = mA.a
T1 - wA = mA.a
24 - 20 = 2.a
4 = 2.a
a = 2 m/s²

Step 2
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Tinjau katrol bergerak rotasi, 
Στ = I.α
(T2 - T1).R = 1/2.m.R².a/R
(T2 - T1).R = 1/2.m.R.a
(T2 - T1) = 1/2.m.a
T2 - 24 = 1/2.2.2
T2 - 24 = 2
T2 = 2 + 24
T2 = 26 N


Jawaban : C


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