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Math Help - Power and Energy

  1. #1
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    Power and Energy

    Can someone help me with this problem? Thanks inadvance.

    Skid is dragged kicking and screaming to Mike's Physics class. A force of 100 N is applied to Skid over a distance 50 m. If it takes 5 mins to do this, what is the power required? Must use energy methods to solve the problem

    P = F d/t so first I tried plug in the values ? (50)/60 secs so I looking for F but what is F in this case. And how do I use energy methods in this case. Thanks again!!!!!!!!
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  2. #2
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    Quote Originally Posted by jsu03 View Post
    Can someone help me with this problem? Thanks inadvance.

    Skid is dragged kicking and screaming to Mike's Physics class. A force of 100 N is applied to Skid over a distance 50 m. If it takes 5 mins to do this, what is the power required? Must use energy methods to solve the problem

    P = F d/t so first I tried plug in the values ? (50)/60 secs so I looking for F but what is F in this case.
    ...
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  3. #3
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    Power = ( Force X Distance ) / Time
    =

    ( 100 X 50 ) / (5 X 60 )

    = 5000/3000
    in joules per second

    Well, you have probly done this already but I think they want you to consider the fact that Skid is traveling with a constant velocity(speed) ,as Power = Force X Velocity
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