tolong bantu yaaa plisss))): k nya = 9x10 pangkat 9 rumus F = k x q1 x q2 / r2 makasih banyak yaaa(:

maaf kalo no 1-2 kurang jelas

semoga membantu ^^

Gaya Coulomb.

Nomor 1
F = kq₁q₂ / r²
    = (9 x 10⁹ Nm²/C²)(2 x 10⁻⁹ C)(3 x 10⁻⁸ C) / (3 x 10⁻² m)²
    = (54 x 10⁻⁸ Nm²) / (9 x 10⁻⁴ m²)
    = 6 x 10⁻⁴ N

Nomor 2
F = kq₁q₂ / r²
    = (9 x 10⁹ Nm²/C²)(2 x 10⁻⁶ C)(8 x 10⁻⁵ C) / (4 x 10⁻¹ m)²
    = (144 x 10⁻² Nm²) / (16 x 10⁻² m²)
    = 9 N

Nomor 3
F = kq₁q₂ / r²
    = (9 x 10⁹ Nm²/C²)(3 x 10⁻⁶ C)(6 x 10⁻⁷ C) / (9 x 10⁻² m)²
    = (162 x 10⁻⁴ Nm²) / (81 x 10⁻⁴ m²)
    = 2 N