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Finding Power

  1. Oct 31, 2010 #1
    1. The problem statement, all variables and given/known data
    I stomped on a stomp rocket aimed at 45degrees. Mass of the rocket is 15grams. It went 27 meters. Without a time device, is it possible to find power?

    2. Relevant equations

    P=[tex]\frac{W}{T}[/tex] = [tex]\frac{FD}{T}[/tex]=FV


    3. The attempt at a solution

    Would the PE=mgh be the force of my stomp?

    What would i be using for acceleration, in P=Fd/T
     
    Last edited: Oct 31, 2010
  2. jcsd
  3. Oct 31, 2010 #2
    If you're looking for the power of your stomp: you can find the initial velocity of the rocket (based on where it landed), and use that to find the work done on the rocket (the change in kinetic energy just as it leaves the ground).

    Then you can approximate the time over which you did the work (i.e. the free fall time over the height of the stomp-thing/air-bag/whatever).

    Otherwise, you could think about where that power is actually coming from---i.e. what exactly is causing the force to be exerted on the air-bag.
     
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