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Jawaban Terkonfirmasi
Massa bumi : mb = 6.10²⁴ kg
jari-jari bumi : rb = 6371 km = 6,4.10⁶ m
massa bulan : mbl = 7,4.10²² kg
jari2 bulan : rbl = 1737 km = 1,7.10⁶ m
h = 2.10⁷ m = 20.10⁶ m
maka:
a. F1 = G. Mb.Mp/(r+h)²=6,67.10⁻¹¹ . 6.10²⁴.4.10³/(6,4.10⁶+20.10⁶)² = 0,23.10⁴ N
b. F2 = G.Mbl.Mp/r² = 6,67.10⁻¹¹.7,4.10²².4.10³/(21,7.10⁶)² = 0,42.10² N
c. g = G.Mbl/r² = 6,67.10⁻¹¹.7,4.10²²/(4.10⁷)² = 3,1.10⁻³ m/s²