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• gaya berat
r1 = R → w1 = 72 N
r2 = (R+h) → w2 = 8 N
h = __?
berat
w = G M m / r²
w berbanding terbalik dengan kuadrat jaraknya
perbandingan
w2 / w1 = (G M m / r2²) / (G M m / r1²)
w2 / w1 = r1² / r2²
8 / 72 = R² /(R + h)²
1 / 9 = R² / (R + h)²....tarik akar
1 / 3 = R / (R + h)... kali silang
R + h = 3R
h = 2R ← jwb