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Homework Help: Spring Potential Energy

  1. Nov 27, 2009 #1
    1. The problem statement, all variables and given/known data

    A package of mass 9 kg sits at the equator of an airless asteroid of mass 6.1 * 10^5 kg and radius 36 m, which is spinning so that a point on the equator is moving with speed 2 m/s. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 189 m/s. We have a large and powerful spring whose stiffness is 1.1*10^5 N/m. How much must we compress the spring?

    2. Relevant equations

    Kp,f = Kp,i + Ui + W

    3. The attempt at a solution

    Im kinda lost at how to attempt this problem so any help explaining me through the process would be great.
  2. jcsd
  3. Nov 27, 2009 #2


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    Homework Helper

    Looks like an energy conversion problem. You could write
    initial energy = final energy
    then put in expressions for the various kinds of energy it has. Don't forget the gravitational potential energy.
  4. Nov 28, 2009 #3
    Alright thanks imma work on this problem and see what i get as an answer
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