How strong is the attractive force between a glass rod with a 0.700μc0.700μc charge and a silk cloth with a –0.600μc–0.600μc charge, which are 12.0 cm apart, using the approximation that they act like point charges?

0.2625 N/C

Explanation:

Force of attraction =

where Q₁ and Q₂ are charges and R is distance between charges.K is a constant equal to 9 x 10⁹.

=

= 0.2625 N/C

we need to know the time interval during which the force acts. impulse of force = momentum change

this could be newton#'s law of cooling. the cooling curve is exponential