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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.
In this section, students learn how work determines changes in kinetic energy and that power is the rate at which work is done. Review understanding of mass, velocity, and acceleration due to gravity. Define the general definitions of the words potential kinetic. Remind students of the equation .
Power Formula. Power is defined as the rate at which work is done upon an object. Power is a time-based quantity. Which is related to how fast a job is done. The formula for power is mentioned below. Power = Work / time. P = W / t
Definition: POWER. Power is the rate at which work is done. P = W t P = 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.
Power is the rate at which work is done or the rate at which energy is transfered from one place to another or transformed from one type to another. The symbol for power is an italicized, uppercase P. P =. ∆ W.
Explanation of power in physics, including concepts and calculations.