Electrostatic and gravitational force

AI Thread Summary
To find the mass of charge q, the relationship between electrostatic force and gravitational force must be established. The electrostatic force is calculated using Coulomb's law, F = kQq/r^2, where k is Coulomb's constant. The gravitational force is given by F = mg, where g is the acceleration due to gravity. By equating the two forces, the mass of charge q can be determined. The calculation involves substituting the known values into the equations to solve for mass.
psysicsfeet
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Homework Statement


Point charge Q = 4.26 μC is fixed at the origin. Now, point charge q = 4.88 μC is carefully placed directly above it (along the y-axis), and it floats at (0,9.51 cm). Find the mass of q, in kg. Assume: g = 9.803 m/s^2.

Homework Equations


F=kq1q2/r^2
G=mg
probably

The Attempt at a Solution


I guess I need to figure out the relationship between electrostatic and gravitational force.
but will it be as simply as F=G?
 
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psysicsfeet said:
simply as F=G?
Try the calculation and see.
 

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