Kecepatan perahu setelah 2 menit
vₚ = v₀ - at
vₚ = 16 - 0,05. 2. 60
vₚ = 16-6 = 10 m/s
Hk kekekalan momentum
(mₜₒₙₒ+ mₜᵢₙᵢ+ mₚ). vₚ = mₜₒₙₒ.v'ₜₒₙₒ + (mₜᵢₙᵢ+mₚ).vp'
(40+15+145). 10 = 40. (-2,5) + ( 15+145).vₚ'
2000 = -100 + 160.vₚ'
vₚ' = 2100/160 = 13,125 m/s
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Kecepatan perahu setelah 2 menit
vₚ = v₀ - at
vₚ = 16 - 0,05. 2. 60
vₚ = 16-6 = 10 m/s
Hk kekekalan momentum
(mₜₒₙₒ+ mₜᵢₙᵢ+ mₚ). vₚ = mₜₒₙₒ.v'ₜₒₙₒ + (mₜᵢₙᵢ+mₚ).vp'
(40+15+145). 10 = 40. (-2,5) + ( 15+145).vₚ'
2000 = -100 + 160.vₚ'
vₚ' = 2100/160 = 13,125 m/s