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Rail gun and magnetic field question

  1. Apr 9, 2012 #1
    1. The problem statement, all variables and given/known data
    The planet Zargon has a magnetic field that is oriented the same as Earth’s, but has a magnitude of 1.26 T! A Royal Zargon Warrior is exploring the Badlands at the Zargon equator when he senses that a vicious octomorph is on top of the rock pillar 9.50 m above him. He dare not move from his position, facing due East, for fear that the octomorph will see him. His rail gun, which has a varible muzzle velocity, shoots pellets of mass 4.00 g, that carry a charge of +1.60 C. What muzzle velocity should the Zargon Warrior adjust his rail gun to in order to kill the octomorph?


    2. Relevant equations

    F=qvbsintheta
    F=mg

    3. The attempt at a solution
    So if he shoots the particle due east, the particle will deflect upward in a circular path with radius =mv/(qB), you want r to be 9.5m/2 = 4.75m, and the rest is algebra. Therefore I got a velocity of 2,394m/s. Is this correct?
     
  2. jcsd
  3. Apr 10, 2012 #2

    ehild

    User Avatar
    Homework Helper
    Gold Member

    Yes, 2394 m/s for the muzzle velocity is correct.

    ehild
     
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