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The Power Formula is used to compute the Power, Resistance, Voltage or current in an electrical circuit. The standard metric unit of power is the Watt. Solved Examples
Power is the rate at which work is done. It is the work/time ratio. Mathematically, it is computed using the following equation. Power = Work / time or P = W / t . The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time.
Power in mechanical systems is the combination of forces and movement. In particular, power is the product of a force on an object and the object's velocity, or the product of a torque on a shaft and the shaft's angular velocity. Mechanical power is also described as the time derivative of work.
The measurement of work and energy with the same unit reinforces the idea that work and energy are related and can be converted into one another. 1.0 J = 1.0 N∙m, the units of force multiplied by distance. 1.0 N = 1.0 kg∙m/s 2, so 1.0 J = 1.0 kg∙m 2 /s 2.
Learn how to calculate power as the rate of energy transfer or work done, and how to measure it in watts or horsepower. Explore the concepts of instantaneous, average and peak power, and how they relate to force and velocity.
Explore the concept of power in physics through an example of two weightlifters, one who lifts faster than the other, to see that power measures the rate at which work is done. Finally, learn how to calculate both average and instantaneous power. Created by David SantoPietro. Questions.
Learn what power is, how to measure it in different units, and how it relates to work and energy. Explore the history of power and its applications from ancient times to the present day.
