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α = 60
g = 9,8 m/s²
hmax = v₀² sin² α/2g
hmax = (14√3)² (sin 60)²/2 . 9,8
hmax = 196 x 3 x 1/4 x 3 / 19,6
hmax = 441/19,6 m = 22,5 m
xmax = v₀² sin 2α/g
xmax = (14√3)² sin 120 / 19,6
xmax = 196 x 3 x 1/2√3 / 19,6
xmax = 294√3/19,6
xmax = 147√3/9,8 m ≈ 26 m
Koordinat posisi titik tertinggi: (xmax/2, hmax) = (13, 22,5)