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In physics, power is the rate of doing work. It is the amount of energy consumed per unit time. The unit of power is the joule per second (J/s), known as the watt (in honor of James Watt, the eighteenth-century developer of the steam engine). For example, the rate at which a lightbulb transforms electrical energy into heat and light is measured ...
Introduction to work and energy. Explore the physics concepts of work and energy. Understand work as energy transferred by force, and kinetic energy as the work needed to accelerate an object. Learn how to calculate work and kinetic energy using formulas, and get introduced to the law of conservation of energy.
Energy versus Power comparison chart; Energy Power; Definition: Energy is the capacity to do work. Energy is power integrated over time. Power is the rate at which work is done, or energy is transmitted. Unit: joules = watt-seconds or joule = Newton-meter: watt = joules/second: Common symbol(s) W: P: Example
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. Thus, a Watt is equivalent to a Joule/second.
This is the definition of the electrical horsepower. 1 electrical horsepower = 746 W. The electrical and mechanical definitions of the horsepower agree with each other to within 4 parts in 10,000. James Watt's horsepower is also roughly the same as lifting a 75 kg mass at a speed of 1 m/s on Earth.
Define power. power synonyms, power pronunciation, power translation, English dictionary definition of power. n. 1. a. The ability or capacity to act or do something ...
Feb 20, 2022 · Power. Power is the rate at which work is done. \ [P = \dfrac {W} {t}\] The SI unit for power is the watt \ (W\), where 1 watt equals 1 joule/second \ ( (1 \, W = 1 \, J/s)\). Because work is energy transfer, power is also the rate at which energy is expended. A 60-W light bulb, for example, expends 60 J of energy per second.
