Given data:
charge 1 (q₁) = 8.0 × 10⁻⁹ coulombs
charge 2 (q₂) = -1.4 × 10⁻⁸ coulombs
distance between fur and brush (r) = 5.0 × 10⁻¹ m
We know that,
The couloumb's law describes the charge between two particles
Mathematically,
F = k.(q₁ . q₂)/r² ----------------------- (i)
Where F = Force between particles
k = constant, 8.99 × 10⁹ Nm²/C² -------------- (ii)
keep the charge, distance values and value of k in equation (i), to determine the magnitude of force
F = 8.99 × 10⁹ ×{ (8.0 × 10⁻⁹) × ( -1.4 × 10⁻⁸)} / (5.0 × 10⁻¹)²
= -4.02 × 10⁻⁶
The force is negative means "the force is attractive"
