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1. Compare the units of the constant proportionality for gravitational force and electric force.

Respuesta :

Units for gravitational constant: [tex]\frac{[N][m^2]}{[kg]^2}[/tex]

Units for electric constant: [tex]\frac{[N][m^2]}{[C]^2}[/tex]

Explanation:

The magnitude of the gravitational force between two objects is given by

[tex]F=G\frac{m_1 m_2}{r^2}[/tex]

where :

G is the gravitational constant

[tex]m_1,m_2[/tex] are the masses of the two objects

r is the separation between them

The units for G can be found by re-writing the formula making G the subject:

[tex]G=\frac{Fr^2}{m_1 m_2} = \frac{[N][m^2]}{[kg]^2}[/tex]

Similarly, the magnitude of the electrostatic force between two charged objects is given by

[tex]F=k\frac{q_1 q_2}{r^2}[/tex]

where:

k is the Coulomb's constant

[tex]q_1, q_2[/tex] are the two charges

r is the separation between the two charges

The units for k can be found by re-writing the formula making k the subject:

[tex]k=\frac{Fr^2}{q_1 q_2} = \frac{[N][m^2]}{[C]^2}[/tex]

So, we see that the only difference between the two units is that for the gravitational constant we have [tex]kg^2[/tex] at the denominator, while for the electric constant we have [tex]C^2[/tex] at the denominator.

Learn more about gravitational and electric force:

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