tolong no 1 song.......

MEDAN GRAVITASI
• gaya

m1 = 90 kg
m2 = 40 kg
r = 15 cm
r1 = __?

m1 : m2 = 90 : 40 = 9 : 4

r1 = [√m1 / (√m1 + √m2)] • r
r1 = [√9 / (√9 + √4)] • (15 cm)
r1 = 3/5 • 15 cm
r1 = 9 cm ← jwb ✓
(dari m1)