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Homework Help: Rosie Pushes box, power output

  1. Jan 15, 2009 #1
    1. The problem statement, all variables and given/known data

    Rosie (mass 58 kg) pushes a box with a horizontal force of 170N (38.216 lb) at a speed of 16 m/min. What is Rosie's power output? Answer in units of W.


    2. Relevant equations

    Work/Time = Power

    MGH/T = Power
    .5MV^2 = Power


    3. The attempt at a solution

    58(.2667 m/sec)^2/2 = power
    2.06 = power
     
  2. jcsd
  3. Jan 15, 2009 #2
    The Power output is rather Work done multiplied by the time taken!
     
  4. Jan 16, 2009 #3

    LowlyPion

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    Homework Helper

    The horizontal force is 170 N

    P = W/T = F*D/T = F*V

    Check your units. You calculated Kinetic energy.

    Watts are N-m/s.
     
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