Electric potential: finding speed and distance?

AI Thread Summary
The discussion revolves around calculating the speed of a second charge when it moves infinitely far from a fixed charge and determining the distance at which it reaches half that speed. The first charge is 3.45 micro C, and the second charge, also 3.45 micro C, is released from a specific position with a mass of 2.3 g. Participants express confusion about the relevant equations, particularly regarding voltage and energy conservation principles. The voltage at the release point is a key factor in solving the problem, and understanding the relationship between charge, voltage, and kinetic energy is essential. Clarification on these concepts is needed to effectively answer the questions posed.
papi
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A charge of 3.45 micro C is held fixed at the origin. A second charge of 3.45 micro C (micro = x10^-6) is released at the position (1.15m, .77 m).

a. If the mass of the second charge is 2.3 g, what is the speed when it moves infinately far from the origin?

b. At what distance from the origin does the 3.45 micro C charge attain half the speed it will have at infinity?

I tried very hard to use the equations I know but am unaware of the ones that can be useful here.
 
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What is the Voltage at the point it was released?
 
I don't know, that's all the question included...
 
papi said:
I don't know, that's all the question included...

That's not a given, but it's something you could figure out.

And if you did ... you could answer the question pretty directly.
 
all I know for that is Q=CV which doesn't seem to help
can you please be more specific bc you're not helping me understand this. thanks
 

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