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Verified answer
ma = 3 kg
mb = 4 kg.
g = 10 m/s²
μ = 0,2
θ = 60° → cos θ = ½
T = __?
Gaya gesekan
f = μ N = μ ma g
f = 0,2 • 3 • 10
f = 6 N
Pada keadaan setimbang
ΣF = 0
mb g - T cos θ - f = 0
4 • 10 - T • ½ - 6 = 0
34 = ½ T
T = 34 • 2/1
T = 68 N ← jwb