What is the electric force between a +2 µC point charge and a –2 µC point charge if they are separated by a distance of 5.0 cm? Show your work. (µC = 1.0 × 10–6 C)

Question

praxer · Answer

Do you the know the formula of the electrostatic force between two charges ? @IDKwut

anonymous · Answer

The equation @praxer is referring to is known as Coulomb's Law.

idkwut · Answer

I am kinda sorta. Lol, just came back from spring break so please refresh my memory! :) Isn't it F = q1q2/r^2 or something.

nali · Answer

$$F= Q1 Q2 / 4\pi \epsilon0 r ^{2} $$

anonymous · Answer

Close! You're forgetting Coulomb's Constant, $k_e$.

nali · Answer

actually this is right or you could also use

F= k Q1Q2 / r^2   any way is right

idkwut · Answer

Oh yea. F = kq1q1/r^2 which is equivalent to the formula Nali posted.

anonymous · Answer

$k_e$ is equal to $ 1 \over 4 \pi \epsilon_0$

anonymous · Answer

Correct!

anonymous · Answer

We know both charges and the distance between them. You just need to plug the values in!

idkwut · Answer

Sorry, I can't really see what you posted (the k = to 1/...) It's rather small.

praxer · Answer

$$\huge k=\frac{1}{4\pi\epsilon_o}$$

nali · Answer

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