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Rumus gaya sentripetal :
Fs = (mv²)/R
Nilai m dan v = konstan, maka didapat persamaan :
Fs₁/Fs₂ = v₁²/v₂²
F/Fs₂ = v₁²/(2v₁)²
F/Fs₂ = v₁²/4v
F/Fs₂ = 1/4
F x 4 = Fs₂ x 1
Fs₂ = 4F
dimana, F = gaya sentripetal mula-mula. Berarti, gaya sentripetalnya menjadi 4 kali semula (Jawaban C)