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Slider crank mechanism. Help needed to find the velocity & angular velocity.

  1. Mar 30, 2012 #1
    1. The problem statement, all variables and given/known data

    The instantaneous configuration of a slider crank mechanism has a crank GH 10cm long, the connecting rod HP is 50cm. The crank makes an angle of 60 degree with the inner dead centre position and is rotating at 110 rev/min. Determine the velocity of the piston P and the angular velocity of the link HP.

    urgent help is needed! i have an exam soon & i have no example of this type of question to work from. please help!!!
     
  2. jcsd
  3. Apr 2, 2012 #2

    tiny-tim

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    hi bobmarly12345 :smile:

    can you provide a diagram? :confused:
     
  4. Apr 2, 2012 #3
    here is the photo of the diagram
     

    Attached Files:

  5. Apr 2, 2012 #4

    tiny-tim

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    ah!

    ok, call the G angle θ, and the P angle ψ (so dθ/dt = ω),

    find the equation relating θ and ψ,

    then use the chain rule to find dψ/dt :smile:
     
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