Two balloons having the same charge of 1.2 × 10-6 coulombs each are kept 5.0 × 10-1 meters apart. What is the magnitude of the repulsive force between them? (k = 9.0 × 109 newton·meter2/coulombs2)

A. 1.2 × 10-2 newtonsB. 3.2 × 10-3 newtonsC. 6.5 × 10-3 newtons D. 3.0 × 10-4 newtonsE. 5.2 × 10-2 newtons

Question

Two balloons having the same charge of 1.2 × 10-6 coulombs each are kept 5.0 × 10-1 meters apart. What is the magnitude of the repulsive force between them? (k = 9.0 × 109 newton·meter2/coulombs2)


A. 1.2 × 10-2 newtonsB. 3.2 × 10-3 newtonsC. 6.5 × 10-3 newtons D. 3.0 × 10-4 newtonsE. 5.2 × 10-2 newtons

whpalmer4 · Answer

$$F = \frac{kC_1C_2}{r^2}$$Plug in the numbers.