Frictional force on a charged particle

A point charge is kept inside an infinitely long thin insulated hollow cylinder of such a small cross-section that this charged particle can just be kept in it.This cylinder has one of it's end at the origin and it extends infinitely towards the positive direction of the x-axis.The charged particle is initially at the point (5 metre,0,0).The inner part of the cylinder and the charged particle have a coefficient of kinetic friction 0.4.At the origin is placed an infinitely long current carrying wire carrying a steady current of \(2000A\) in the +ve Z direction. The particle has a positive charge of \((3.125E+5)C\).Now it is imparted an initial velocity of \(500m/s\) in the +ve x direction.If the distance travelled by the particle before it comes to rest is L metre then, find L/6.The mass of the charge is \(0.2kg\).Consider gravity free conditions.

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