1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    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


    User Avatar
    Homework Helper

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

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook