What is the magnitude of the force of repulsion between them?

[xswtxoj]

Homework Statement

Two point charges are separated by a distance r and repel each other with a force F. If
their separation is reduced to 0.293 times the original value, what is the magnitude of
the force of repulsion between them?

Homework Equations

The Attempt at a Solution

 

[LowlyPion]

What would your approach be here?

 

[xswtxoj]

0.293 + r+F= r+ 0.293?

 

[LowlyPion]

Based on what formula?

 

[xswtxoj]

F= Keq/r sqed

 

[LowlyPion]

So F = k*qq/r²

They want you to use .293*r instead or r

What effect does that have on F?

 

[xswtxoj]

F is consider the electric field force

 

[LowlyPion]

Yes.

So what's the answer?

 

[xswtxoj]

F = k*qq/r2 F= 8.99x 10^9 * (1.6x 10 ^-19 ) sqed divide by .293 = 2.68x 10^ -27,