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Static equilibrium, machines; handheld press

  1. Jul 20, 2015 #1
    1. The problem statement, all variables and given/known data
    The handheld press is useful for such tasks as squeezing rivets or punching holes. What force P is applied to the sheet metal at E for the 64-N forces applied to the handles?
    20150720_225018_zpspvumd4i8.jpg
    2. Relevant equations


    3. The attempt at a solution
    20150720_225004_zps2oxrnb5s.jpg
    Not sure how to get this one started, i initially took the moment of the top piece but that didnt solve for anything.
     
  2. jcsd
  3. Jul 21, 2015 #2
    I think you made a very good start with the first free body diagram. I think the key is to realize that the cylinder DE (shown as hidden lines) is free to move vertically independently.
     
  4. Jul 21, 2015 #3

    haruspex

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    Think about mechanical advantage and movement ratios.
    If the lever is moved down a small distance dx, by how much does the angle change?
    If the angle changes by a small amount ##d\theta##, how far does D move down?
    (Draw yourself a larger diagram of the C/D region).
     
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