If the electric force between two charges is 4.2 × 10-2 N, what would the new force be if the distance between the charges is doubled and the charge on one of the charges is tripled?

New force = 0.063 N

Explanation:

Given that,

The electric force between two charges is

The formula for the electric force is:

If the distance between the charges is doubled, r' = 2r and one of the charges is tripled, q₁' = 2q₁, q₂' = 3q₂

Put all the values,

So, the new force is 0.063 N.

The force becomes 0.0315 N.

Explanation:

Force, F = 4.2 x 10^-2 N

When the distance is doubled, a charge is tripled, Let the force is F'.

The force between the two charges is

when, q' = 3 q' and r is 2 r so

f=ma newton

f=100x2.5=250n

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