Coulomb's Law Calculator :: Equations

Physics

Coulomb's Law Calculator

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Coulomb's Law Equation

$$ F \enspace = \enspace k \enspace \frac{ q_1 \enspace q_2 }{ r^2 } $$

$ F $	-	Force in newtons (N)
$ k $	-	Coulomb constant = 8.988 × 10⁹ N m² / C²
$ q_1 $	-	Charge 1 in coulombs (C)
$ q_2 $	-	Charge 2 in coulombs (C)
$ r $	-	Distance between centres of masses in metres (m)

Find:

$ F $

= $ k \enspace \displaystyle{ \frac{ q_1 \enspace q_2 }{ r^2 } } $

= $ k \enspace \times \enspace $

$ \mathrm{ C } \enspace \times \enspace $ $ \mathrm{ C } $

$ ( $ $ \mathrm{ m } $ $ ) $ $ \mathrm{^2} $

= $ \mathrm{ N } \, (\mathrm{ newtons }) $

= $ \mathrm{ N } \, (\mathrm{ newtons }) $ (to significant figures)

$ q_1 $

= $ \displaystyle{ \frac{ F \enspace r^2 }{ k \enspace q_2 } } $

$ \mathrm{ N } \enspace \times \enspace $ $ ( $ $ \mathrm{ m } $ $ ) $ $ \mathrm{^2} $

$ k \enspace \times \enspace $ $ \mathrm{ C } $

= $ \mathrm{ C } $

= $ \mathrm{ C } $ (to significant figures)

$ q_2 $

= $ \displaystyle{ \frac{ F \enspace r^2 }{ k \enspace q_1 } } $

$ \mathrm{ N } \enspace \times \enspace $ $ ( $ $ \mathrm{ m } $ $ ) $ $ \mathrm{^2} $

$ k \enspace \times \enspace $ $ \mathrm{ C } $

= $ \mathrm{ C } $

= $ \mathrm{ C } $ (to significant figures)

$ r $

= $ \displaystyle{ \sqrt{ \frac{ k \enspace q_1 \enspace q_2 }{ F } } } $

$ ( $

$ k \, \times \, $ $ \mathrm{ C } $$ \, \times \, $ $ \mathrm{ C } $

$ \mathrm{ N } $

$ ) $

^{$^{-2}$}

= $ \mathrm{ m } $

= $ \mathrm{ m } $ (to significant figures)

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\( F \)	-	Force in newtons (N)
\( k \)	-	Coulomb constant = 8.988 × 10⁹ N m² / C²
\( q_1 \)	-	Charge 1 in coulombs (C)
\( q_2 \)	-	Charge 2 in coulombs (C)
\( r \)	-	Distance between centres of masses in metres (m)