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Verified answer
Usaha Dan EnergiDik : m = 4 kg
Ek₀ = 400 J
g = 10 m/s²
Dit : Ek : Ep saat 5 m = __ ?
Jwb :
Ek₀ = ½ m v₀²
400 = ½ × 4 × v₀²
200 = v₀²
vₜ² = v₀² - 2gh
vₜ² = 200 - (2 × 10 × 5)
vₜ² = 200 - 100
vₜ² = 100
• Ek saat 5 m :
Ekₜ = ½ m vₜ²
Ekₜ = ½ × 4 × 100
Ekₜ = 200 J
• Ep saat 5 m :
Epₜ = mgh
Epₜ = 4 × 10 × 5
Epₜ = 200 J
Perbandingan :
Ek : Ep = 200 : 200
= 1 : 1