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v=2πrf
F=m(2πrf )²/r
F=4π²mf²r
4π²m₁f₁²r₁=4π²m₂f₂²r₂
m₁f₁²r₁=m₂f₂²r₂
m₁f₁²r₁=8m₁f₂²2r₁ m₁ i r₁ skracamy
f₁²=16f₂²
f₁=4f₂