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Bulle-Block mass question

  1. Nov 26, 2008 #1
    1. The problem statement, all variables and given/known data
    A bullet of mass 0.0100kg moving horizontally strikes a block of M=5kg and becomes embedded. If the block bullet move a distance of 6 m on a rough horizontal table. The coefficient of kinetic friction is 0.300. What is the speed of the bullet before striking the block ?

    2. Relevant equations

    m1v1= ( M+m) V2 - fkd (1)

    3. The attempt at a solution

    I got two unknowns and one equation. I do not have V2 and v1 so l am stuck.
  2. jcsd
  3. Nov 27, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    This looks like some mix of momentum conservation and work. No good!

    Find two equations:
    (1) Conservation of momentum for the collision.
    (2) Energy/work applied after the collision.

    Hint: Use equation 2 first.
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