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Converting kinetic energy into BTUs?

  1. Sep 5, 2010 #1
    1. The problem statement, all variables and given/known data
    "A body whose mass is 2lb experiences an increase in velocity from 20 ft/s to 50 ft/s.
    Determine the change in kinetic energy in BTUs"


    2. Relevant equations
    ----


    3. The attempt at a solution

    As of right now I have [tex]\Delta[/tex]KE=2100 lb_m ft^2/s^2

    I don't know how to change that into BTUs. I don't even know what BTUs are.
    For example a joule is a kg*m/s^2, so what is a BTU in terms of pounds mass?

    Thanks for any help
     
  2. jcsd
  3. Sep 6, 2010 #2
    You could just try converting the 2 lb. mass into kg. and the two velocities given into m/s so that solving for the change in kinetic energy would be in Joules. Should be pretty easy to find those three conversion factors.
     
  4. Sep 6, 2010 #3
    ok, yeah i guess i could do that.
    Thanks!
     
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