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Magnetic force on a moving charge particle with friction force acting on it

  1. Aug 14, 2010 #1
    1. The problem statement, all variables and given/known data

    A "q" charge particle is moving along +y axis with velocity V0 starting from Origin. A friction force is acting on the charge particle " f= -(alpha)V(Vector) ".A constant magnetic field of magnitude B0 acting along +Z axis. The mass of the particle is m. Find the x co-ordinate of the particle when it stops.

    2. Relevant equations



    3. The attempt at a solution

    I Have found that the total path moved by the particle is mV0/(alpha)

    But I don't know how to find x coordinate with it.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Aug 14, 2010 #2
    There is a quick way to solve this problem: write down the Newton 2nd law equation in vector form and integrate it :wink:
     
  4. Jul 17, 2011 #3
    I have solved the problem. I am just too lazy to type the WHOLE thing out here. The solution is kind of long. Basically, get the general velocity along X axis and Y axis as a function of time.
    To obtain this, in the penultimate step, you will get a differential equation that you will have to solve using Complex numbers.
    In the end, the velocities will be something of the type v0*[e(^(-constant))]*cos(wt), where w is the angular frequency.
     
  5. Jul 17, 2011 #4
    You are not even allowed to write whole solution. you can just give hints.
     
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