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Homework Help: Physics work question

  1. Nov 12, 2015 #1
    • Post moved from another forum, so homework template missing
    Im trying to understand how to approach this problem.
    9kPouLQ.jpg
     
  2. jcsd
  3. Nov 12, 2015 #2
    For the first part i got F=(0.5(M +m)v^2)/d
     
  4. Nov 12, 2015 #3

    A.T.

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    For the first question that is already too much. It's a trivial question about the definition of work. For the second part you should find the force acting on the plate, and again apply the definition of work.
     
  5. Nov 12, 2015 #4
    What do you mean? I did use the definition of work to solve this
     
  6. Nov 12, 2015 #5

    A.T.

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    What do you need that "(0.5(M +m)v^2)" part for?
     
  7. Nov 12, 2015 #6
    Are you not supposed to solve for F using the work formula?
     
  8. Nov 12, 2015 #7

    A.T.

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    You are supposed to find W, not F. And what does "(0.5(M +m)v^2)" have to do with that?
     
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