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ma = 7 kg
mb = 3 kg
g = 10 m/s^2
Dit :
T = ?
Jawab :
Tinjau Balok A
Sigma Fy = ma
T - w = ma
T = ma + w
T = 3a + 30...1
Tinjau Balok B
Sigma Fy = ma
w - T = ma
T = w - ma
T = 70 - 7a...2
2 ke 1
T = 3a + 30
70 - 7a = 3a + 30
10a = 40
a = 4 m/s^2
T = 3a + 30
T = 3×4 + 30
T = 42 N