Mastering physics help - rail gun

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The discussion focuses on solving a physics problem related to a rail gun, specifically regarding the use of energy methods due to non-constant acceleration. The user seeks clarification on the potential energy formula applicable in this scenario. They mention the formula for the force on a current-carrying wire in a magnetic field, F=BIL, which they used to determine acceleration but are unsure how it relates to the magnetic field strength (B). Additionally, there is a question about the type of current involved, which is supplied by a capacitor. The conversation emphasizes the need for understanding the relationship between current, magnetic fields, and energy in this context.
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I think i need to use energy methods for this because the acceleration is not constant..
trouble is I don't know the formula for the potential energy in cases like this.

Thanks for any help.
 

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What's the force on a current-carrying wire in a magnetic field? (There is a formula for it.)
 
F=BIL that's how i found the acceleration.. but i don't see how that helps with b??
 
how was this current produced in the first place? What kind of current are you dealing with?
 
I don't know what you mean? it was supplied by a cap if that helps?
 

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