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To pull a wagon we need a force of 300 N. How much work is done if we

  1. Dec 22, 2012 #1
    To pull a wagon we need a force of 300 N. How much work is done if we pull the wagon 8 km?? And how much is the effect if the wagon is being pulled for 40 min.?? And if we pull the wagon for 40 min. and the effect is 5kw, how far can we pull the wagon???
     
  2. jcsd
  3. Dec 22, 2012 #2
    Re: heat&energy&effect

    "To pull a wagon we need a force of 300 N. How much work is done if we pull the wagon 8 km??"
    Work done = 300N*8000meters = 2400KJ.

    "And how much is the effect if the wagon is being pulled for 40 min.?? "
    What is the effect?Power?
    Power = work/time = 2400KJ/(40*60 seconds) = 1KW.
    "And if we pull the wagon for 40 min. and the effect is 5kw, how far can we pull the wagon???"
    Again, what do you mean by effect? Power?
    If you want distance,
    Power = work/time
    5KW = work/(40*60sec)
    work = 12000KJ.
    Distance = work/force
    = 12000KJ/300N = 120 Kilometers.
    I tried my level best to understand your question. Be clear in what ever you want to ask.
     
    Last edited: Dec 22, 2012
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