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Work problem

  1. Oct 11, 2005 #1
    How much work is done by a person lifting a 2.0kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0s?

    I know w=fd. I found the distance to be 10m. But what is the force? F=ma so what is the acceleration of the system?
     
  2. jcsd
  3. Oct 11, 2005 #2

    Doc Al

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    Staff: Mentor

    Since the object is being lifted at constant speed, what does that tell you about the acceleration? What's the net force on the object? (There are two forces acting on the object: the force applied by the person and the weight of the object.)
     
  4. Oct 11, 2005 #3
    Wouldn't that mean that the acceleration is 0? So would I use w=mgh?
     
  5. Oct 11, 2005 #4

    Doc Al

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    Staff: Mentor

    Yes and yes.
     
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