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Calculate New Load - rig application

  1. May 24, 2016 #1
    1. The problem statement, all variables and given/known data
    A rig accelerates a load of 200,000 lbf from zero to 60 ft/min in 5 seconds.

    2. Relevant equations
    Compute new load shown on the hook load indicator ?

    3. The attempt at a solution
    Calculated the distance of load l = 4.99 ft.
     
  2. jcsd
  3. May 24, 2016 #2

    berkeman

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    Staff: Mentor

    Can you please show more of your work? Can you attach a diagram of the problem? Is all of this acceleration vertical?
     
  4. May 24, 2016 #3
    Hello Berkeman:

    Thank you for your reply. I don't have a diagram attached. Yes the acceleration is vertical. The hook lowers/hoist loads vertically in a drilling rig.
     
  5. May 24, 2016 #4

    berkeman

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    Staff: Mentor

    So the two things creating the tension in the cable is the weight of the load, and the extra force needed to generate that acceleration. Can you start to write down the equation for the total force on the accelerating object now? :smile:
     
  6. May 24, 2016 #5
    Yes.

    P-T = ma
     
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