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More Yr 11 HW help

  1. Sep 9, 2008 #1
    1. The problem statement, all variables and given/known data
    How much energy could be derived from slowing a body of mass 5.8Kg from 2.3m/s to 1.5m/s?

    2. Relevant equations

    3. The attempt at a solution
    I dont even know what formula to use here so if someone could give me a couple of formlula that would be good to start with. thanks
  2. jcsd
  3. Sep 9, 2008 #2
    You could find the change in kinetic energy (energy of motion). Ke = (1/2)*m*v^2
  4. Sep 9, 2008 #3
    I have tried that and it doesnt work for me??
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