Question

After brushing, Fluffy's fur has a charge of +8.0 × 10-9 coulombs and her plastic brush has a charge of –1.4 × 10-8 coulombs. If the distance between the fur and brush is roughly 5.0 × 10-1 meters, what is the approximate magnitude of the force between them?
5.0 × 10-6 newtons

2.0 × 10-4 newtons

4.0 × 10-6 newtons

2.5 × 103 newtons

Answer 1

@DanJS

Answer 2

Don't bother I already failed the test and i can't retake it.

Answer 3

recall:

\[Force = k \frac{ q _{1}q_{2} }{ r^2 }\]

Answer 4

oh

Answer 5

Yea..