What is the magnitude of the force of particles?

[haengbon]

Homework Statement

Two charged particles exert an electrostatic force of 10 N. What will be the magnitude of the force if q1 is three times q2 and the distance between particles is increased to five times the original distance?

Homework Equations

The Attempt at a Solution

I don't have the slightest idea as to how to answer this. someone please help?

 

[tiny-tim]

Two charged particles exert an electrostatic force of 10 N. What will be the magnitude of the force if q1 is three times q2 and the distance between particles is increased to five times the original distance?

Hi haengbon!

Call the original distance x.

What equations do you know that might help?

 

[haengbon]

Hi haengbon!

Call the original distance x.

What equations do you know that might help?

thank you for replying!

I honestly don't know any equations for it :(

 

[chemisttree]

Have you heard of Coulomb's Law? Good place to start.

 

[haengbon]

is it the F=k(q1q2)/r2?

so... k=9x10^9 and F=10...

that's all I understand from it :(

 

[tiny-tim]

Hi haengbon!

(try using the X² and X₂ tags just above the Reply box )

is it the F=k(q1q2)/r2?

so... k=9x10^9 and F=10...

Yes, that's the force of one charged particle on the other at distance r.

So how much will the magnitude, F, of the force be if the distance between the same particles is increased to five times r?

 

[haengbon]

Hi haengbon!

Yes, that's the force of one charged particle on the other at distance r.

So how much will the magnitude, F, of the force be if the distance between the same particles is increased to five times r?

so...it'll be

F= K(Q₁Q₂)/r
10= 9x10⁹(Q₁Q₂)/ r(5) ?

I really appreciate your guidance through the whole problem ^^

 

[tiny-tim]

Hi haengbon!

(just got up :zzz: …)

so...it'll be

F= K(Q₁Q₂)/r
10= 9x10⁹(Q₁Q₂)/ r(5) ?

I really appreciate your guidance through the whole problem ^^

i] what happened to r² ?

ii] you're not reading the question carefully …

what is 10?