What is the electrical force of attraction between two balloons with separate charges of +3.5 x 10-8 C and -2.9 x 10-8 C when separated a distance of 0.65 m?

Question

23546 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-02-20T11:24:30

The answer is: $F=-2,16xx10^-5N$ .

The law is:

$F=1/(4piepsilon_0)(q_1q_2)/r^2$ , or $F=k_e(q_1q_2)/r^2$ , where

$k_e=8,98*10^9C^-2m^2N$ is the constant of Coulomb.

So:

$F=8,98xx10^9C^-2m^2N*(3,5xx10^-8C*(-2,9)xx10^-8C)/(0,65m)^2=$

$=-216xx10^-7N=-2,16xx10^-5N$ .