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Verified answer
Dinamika GayaFisika X
Dik
F = 20 N
m₁ = 4 kg
m₂ = 3 kg
m₃ = 2 kg
m₄ = 1 kg
Dit
Tegangan tali antara m₁ dan m₂ (T₁)
Jaw
Tegangan tali antara tiap benda adalah sama, selama sistim berada di atas permukaan licin (tanpa gesekan)
T₁ = T₂ = T₃ = T₄
Diagram benda bebas untuk sistim
[m₄]T₃→ ←T₃[m₃]T₂→ ←T₂[m₂]T₁→ ←T₁[m₁]F→
Step-1
Hitung percepatan sistim (a)
∑F = (∑m)(a)
F - T₁ + T₁ - T₂ + T₂ - T₃ + T₃ = (m₁ + m₂ + m₃ + m₄)(a)
20 = (4 + 3 + 2 + 1)(a)
Diperoleh percepatan sistim sebesar a = 2 m/s²
Step-2
Hitung tegangan T₁
Diagram benda bebas untuk sistim benda m₁
←T₁[m₁]F→
∑F = (m₁)(a)
F - T₁ = (m₁)(a)
T₁ = F - (m₁)(a)
T₁ = 20 - (4)(2)
T₁ = 12 N
Jadi besar tegangan T₁ = 12 N
Verified answer
DINAMIKAbidang datar licin
m₁ = 4 kg
m₂ = 3 kg
m₃ = 2 kg
m₄ = 1 kg
F = 20 N
T₁ = ___?
T₂ = ___?
T₃ = ___?
gaya tegangan tali
T₁ = [(m₂ + m₃ + m₄) / (m₁ + m₂ + m₃ + m₄)] • F
T₁ = [(3+2+1) / (4+3+2+1)] • 20
T₁ = 6/10 • 20
T₁ = 12 N ← jwb
T₂ = [(m₃ + m₄) / (m₁ + m₂ + m₃ + m₄)] • F
T₂ = [(2+1) / (4+3+2+1)] • 20
T₂ = 3/10 • 20
T₂ = 6 N ← jwb
T₃ = [m₄ / (m₁ + m₂ + m₃ + m₄)] • F
T₃ = [1 / (4+3+2+1)] • 20
T₃ = 1/10 • 20
T₃ = 2 N ← jwb