Electric Charge on spheres suspended from an angle

AI Thread Summary
Two small spheres, each with a mass of 3g and an unknown charge, are suspended by threads at a 15-degree angle from the vertical. To determine the charge on each sphere, one must analyze the forces acting on them, considering equilibrium conditions since the spheres are not moving. A free body diagram is recommended to visualize the forces, which include gravitational and electrostatic forces. The possible charge values provided are .79µC, 2.9µC, 75mC, 6.3µC, and .11µC. Understanding the balance of forces is crucial for solving this problem accurately.
Kathi201
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There is a picture for this question so I will try to describe it to my best ability.

Two small spheres, each with mass m=3g and charge q, are suspended from a point by threads of length L=.22m. What is the charge on each sphere if the threads make an angle of 15 degrees with the vertical?
a. .79µC
b.2.9µC
c.75mC
d.6.3µC
e. .11µC


In the picture there are two spheres hanging from the ceiling by two strings with length L and the angle between the two strings and the vertical is given.


Any help would be appreciated...
 
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Hi Kathi201,

Kathi201 said:
There is a picture for this question so I will try to describe it to my best ability.

Two small spheres, each with mass m=3g and charge q, are suspended from a point by threads of length L=.22m. What is the charge on each sphere if the threads make an angle of 15 degrees with the vertical?
a. .79µC
b.2.9µC
c.75mC
d.6.3µC
e. .11µC


In the picture there are two spheres hanging from the ceiling by two strings with length L and the angle between the two strings and the vertical is given.


Any help would be appreciated...

If the spheres are not moving, what has to be true for each sphere?
 
It would also help if you used a free body diagram for this question.
 
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