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Homework Help: Need help with velocity problems PLease

  1. Dec 13, 2009 #1
    Need help with velocity problems!!!! PLease

    1. The problem statement, all variables and given/known data
    Work is also measured in Joules. If a 2.59 kg object moves a distance of 56.9 cm as a result of 38N of foce. How fast is the object moving.


    2. Relevant equations
    ?


    3. The attempt at a solution
    I started by trying to find the velocity using the square root of 2K(kinetic Energy) divided by the mass.
     
  2. jcsd
  3. Dec 13, 2009 #2
    Re: Need help with velocity problems!!!! PLease

    what did you get for KE in terms of the values provided?
     
  4. Dec 14, 2009 #3
    Re: Need help with velocity problems!!!! PLease

    idk i need help with this stuff in general
     
  5. Dec 14, 2009 #4
    Re: Need help with velocity problems!!!! PLease

    The question is a bit fuzzy IMO, but it starts with a statement about work.

    Work is defined as force x distance.

    If we can assume that all of that work went into propelling the object and none into say potential energy like moving it up a ramp:

    the kinetic energy of the mass should be equal to that same quantity.
     
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