What is the force, in terms of Coulomb's constant, between two electrical charges of $- 225 C$ $-225 C$ and $- 75 C$ $-75 C$ that are $15 m$ $15 m$ apart?

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Answer 1 · 2016-01-17T13:36:08

$6.75 \times 10^{11}$ $6.75xx10^11$ Newtons repulsive force

Coulombs force $F=1/(4πε_0) (q_1 q_2)/r^2$
Here $1/(4πε_0)$ is a constant with the value of $9xx10^9$ $Nm^2C^-2$

Substituting the values $F=9xx10^9 (-225xx-75)/15^2$
= $6.76xx10^11$ $N$

As the result is positive the force between the charges would be repulsive.

What is the force, in terms of Coulomb's constant, between two electrical charges of -225 C−225C-225 C and -75 C−75C-75 C that are 15 m 15m15 m apart?