F21⃗=−F12⃗\vec{F_{21}}=-\vec{F_{12}}F21=−F12
∣F21⃗∣=∣F12⃗∣=F|\vec{F_{21}}|=|\vec{F_{12}}|=F∣F21∣=∣F12∣=F
Behind Coulomb's Law
F=k⋅∣q1∣⋅∣q2∣r2F=k \cdot \frac{|q_1|\cdot |q_2|}{r^2}F=k⋅r2∣q1∣⋅∣q2∣
Where will we write
r=k⋅∣q1∣⋅∣q2∣Fr=\sqrt{ \frac{k \cdot |q_1|\cdot |q_2|}{F}}r=Fk⋅∣q1∣⋅∣q2∣
r=9⋅109⋅6.6⋅10−6⋅4.0⋅10−625=0.097m=9.7smr=\sqrt{ \frac{9 \cdot10^9 \cdot 6.6 \cdot 10^{-6}\cdot 4.0 \cdot 10^{-6}}{25}}=0.097 m=9.7 smr=259⋅109⋅6.6⋅10−6⋅4.0⋅10−6=0.097m=9.7sm
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