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Homework Help: Instantaneous Power (Mastering Physics)

  1. Oct 1, 2008 #1
    1. The problem statement, all variables and given/known data

    Let us now consider several questions that include numeric data.

    A sled is being pulled along a horizontal surface by a horizontal force F of magnitude 600 N. Starting from rest, the sled speeds up with acceleration 0.08 m/s2 for 1 minute.

    Find the instantaneous power P created by force F at t=10s.

    Express your answer in watts to three significant figures.

    2. Relevant equations

    Pavg = [tex]\frac{\Delta W}{\Delta t}[/tex]
    P = [tex]\frac{dW}{dt}[/tex]

    3. The attempt at a solution
    I have solved for velocity after 10s.

    v = 0.8 m/s

    I'm stuck at where to go from here.
  2. jcsd
  3. Oct 1, 2008 #2
    Do not forget that Power can also be expressed as P = Fv
  4. Oct 1, 2008 #3
    If I'm not mistaken, that is the formula for Pavg. I am trying to solve for the instantaneous power, unless you know something I don't.
  5. Oct 1, 2008 #4
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