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m, M terpisah sejauh r
ingin di tambh F menjadi 4 F
dit : apa yg dilakukan ?
dijawab :
Rumus :
F = G mxM/r²
jadi :
F1/F2 = (G m M/r1²) / (G m M/r2²)
F1/F2 = (r2/r1)²
F/4F = (r2/r1)²
r2/r1 = √(1/4)
r2/r1 = 1/2
r2 = 1/2 r1
jadi jawabannya :
a. memperpendek jarak kedua benda menjadi 1/2 r