Bantu jawab pakai cara soal nomor 12-14

12][ ??

13 dan 14][
2 bidang miring lucin
sin α = 3/5
tan θ = 4/3 → sin θ = 4/5
m₁ = 5 kg
m₂ = 2 kg
g = 10 m/s²
T = __?
a = __?

Percepatan
Tinjau sistem benda keseluruhan
ΣF = Σm a
m₁g sin α - m₂g sin θ = (m₁ + m₂) a
5•10 • 4/5 - 2•10 • 3/5 = (5+2) • a
40 - 12 = 7 a
28 = 7 a
a = 4 m/s² ← jwb

Gaya tegangan tali
Tinjau benda m₂
T - m₂g sin θ = m₂ a
T - 2•10 • 3/5 = 2 • 4
T - 12 = 8
T = 20 N ← jwb

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