• Work is the product of Force and the Distance that force moves an object. In equation form: W = F * d Work is often measured in Joules (Newton meter), Force in Newtons, and Distance in meters. Energy is the capability of a thing to do work. There are a variety of different forms of energy, and I won't get into all of them here. For the purposes of relating Energy to Work, it usually suffices to talk only about Kinetic Energy. E = 1/2 * m * v^2 m = mass (usually in kg) and v = velocity (in meters / second). E = Kinetic Energy and is usually measured in Joules. The relationship between the two is given in the Work-Energy formula: W = E1 - E2 , where E1 is initial Energy and E2 is final Energy. Power is Work done over Time. P = W / t P = Power in Watts, W = Work in Joules, and t = time in seconds. Units applied are typical of physics problems, but they can be exchanged for other units (Imperial or otherwise) if so required.
  • simply as my physics teacher puts it: power is the rate at which you do work. energy is the ability to do work.
  • Power is rate of energy spent per unit time. For example: Watt = A unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm Here, joule is the unit of energy = the work done when a current of one ampere passes through a resistance of one ohm for one second

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