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Coulomb's law 
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#1
Jan2011, 02:01 PM

P: 8

I don't really know how to solve this problem. I only know how to calculate the net force on B, not A...
here is the problem: sphere A is located at the origin and has a charge of +2.0x10^6 C. Sphere B is located at +.6m on the xaxis and has a charge of 3.6x10^6 C. Sphere C is located at +.8 m on the xaxis and has a charge of +4.0x10^6 C. Determine the net force on sphere A. I know how to find the net force on sphere B, since it's in the middle... but i have no idea when it comes to sphere A... would the net force on sphere A be the same as the net force on sphere C? Thank you! PS:im new to this forum!! :D 


#2
Jan2011, 02:22 PM

P: 1,135

Write forces on A, the one acting along +X axis ... take them positive and the opposite, take them negative ...
Keep in mind that like charges repel and unlike charges attract!! 


#3
Jan2011, 02:28 PM

P: 8

and then subtract these two forces to get a net force on A? 


#4
Jan2011, 02:33 PM

P: 1,135

Coulomb's law
yes
because C will push A along X and B will attract A along +X 


#5
Jan2011, 05:50 PM

P: 8




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