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=1/2×10m/s2×30
=5×900
=4500 J
α = 30′
Energi di posisi awal
Eko = ½ m Vo²
Energi di posisi tertinggi
Ekt = ½ m (Vo cos α)²
Ekt = ½ m Vo² cos²α
Perbandingan
Eko : Ekt
= (½ m Vo²) : (½ m Vo² cos²α)
= 1 : cos²α
= 1 : (½√3)²
= 1 : ¾
= 4 : 3 ← jwb