Finding Distance Using a Fuse, Current & Magnetic Field

[bubbaburp]

Hello. I want to help a friend solve a problem. I'm having trouble finding the right way to solve for distance for this problem. I am given 2 parallel wires connected by another wire or perhaps a conducting fuse. His information is kind of vague, sorry. The current goes up one of the wires through the fuse and down the other wire. The magnetic field B is in the k (z)-direction and has a value of 4.7 T. The current is 7.2 A. The distance between the two wires is 0.48 meters. The distance from the fuse up to where the particle is shot out is 0.7 meters. How the heck do you find the distance the particle travels out if it starts out initially at rest, and the acceleration is uniform?

 

[chrisbaird]

This question makes no sense to me. Rail guns don't shoot out electrons. They use electromagnetic forces to shoot out objects. And you ask how far does a particle travel that is accelerated and shot out; the answer is that is travels an infinite distance due to inertia unless acted upon by some force. But I have a feeling that you are trying to ask something else and don't know what words to use.