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8 September, 22:27

How are energy, time, and power related?

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  1. 9 September, 00:43
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    Power = (energy) divided by (time)
  2. 9 September, 01:30
    0
    work is a measure of energy

    If I have a pile of bricks that I want to move from my yard into the garage we would agree that I need energy to do this (work is force times distance so work is a measure of energy required to move 50 kg [mass with an acceleration toward the earth due to gravity] of bricks 10 meters into my garage)

    How time and power relate is as follows:

    If I want to move the 50 kg of bricks into the garage in 30 minutes, it will require a certain amount of power. If I want to do this in 5 minutes I will need even more power. Again, power is the amount of work (energy) done per unit time.

    The math of it is:

    F=ma

    w = F*d

    Power = w/t

    (instantaneous power is the derivative of work with respect to time
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