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Find the final velocity of a metallic bar

  1. Dec 17, 2016 #1
    1. The problem statement, all variables and given/known data
    We have a ramp with some angle theta. The metallic bar sitting on a ramp at height h. Also, we have some weight that attached by a rope to a metallic bar while hanging on the height h. There is a magnetic field with a magnitude B and direction k.
    M = metallic bar
    m = weight
    height is the same for metallic bar and weight

    2. Relevant equations
    PE + KE = PE +KE
    F = q*v*B


    3. The attempt at a solution
    Mgh + mgh = 0.5MV^2 + mgh(1+1/sin/tetha)

    Solve for V.

    Then I am lost because the magnetic field does not do work. Hence the final velocity is not changing due to a presence of a magnetic field.
     
  2. jcsd
  3. Dec 17, 2016 #2

    haruspex

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    This is going to require either a diagram or a far better description.
     
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