Calculating Electric Force between Charged Balloon and Denim

AI Thread Summary
A balloon gains a charge of -8 microC after being rubbed against denim, which consequently acquires a charge of +8 microC. The electric force between the two can be calculated using the formula F electric = K q1 * q2 / r^2, where K is the electrostatic constant, q1 is the charge of the balloon, q2 is the charge of the denim, and r is the distance between them (5.0 cm). The discussion highlights the importance of recognizing that both objects must have equal and opposite charges for the calculation to be valid. The participants confirm that the initial state of both the balloon and denim was neutral, leading to the conclusion that the charges are indeed -8 microC for the balloon and +8 microC for the denim. This understanding allows for the proper application of the formula to find the electric force.
freeofwork
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Question:

A baloon rubbed aginst denim gains a charge of -8microC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.)

Equations used:
F electric = K q1 X q 2 / r^2


Steps Tried:
How can I solve this is I only have one charge?
 
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freeofwork said:
Question:

A baloon rubbed aginst denim gains a charge of -8microC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.)

Equations used:
F electric = K q1 X q 2 / r^2


Steps Tried:
How can I solve this is I only have one charge?
From where did the balloon pick up its charge ?
 
SammyS said:
From where did the balloon pick up its charge ?

The denim.
 
freeofwork said:
The denim.
So, what do you suppose the charge on the denim is after giving up -8 μC of charge ?
 
Is the balloon and denim at first neutral? Then I guess the balloon would have a -8microC and the denim a +8microC. If this is correct, then I know how to solve this problem.

Thank you for making my brain actively think!
 

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