## anonymous one year ago A balloon, when rubbed against denim, gains a charge of -10μC. The force between the balloon and the denim when they are separated by a distance of 5 cm is?

1. anonymous

use Coulomb's Law which described the magnitude of the electrostatic attraction or repulsion force thusly: $$\huge F = k \frac{q_1 \ q_2}{r^2}$$ If the balloon gains a charge of -10μC, conservation of charge says what about the denim? and look $$k$$ up - Coulomb's constant.