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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 Formula. We can refer to power as the rate at which we do work. Also, it is the ratio of work and time. Besides, we calculate it mathematically using this formula or equation. Power = work time. Or. Power (Watt) = W t. Derivation of Power formula. Power = unit of measure (Watt) W = work done by the body. t = time taken to do the work.
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.
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. For historical reasons, the horsepower is occasionally used to describe the power delivered by a machine.
By definition, one watt is equal to one joule of work done per second. So if P represents power in watts, Δ E is the change in energy (number of joules) and Δ t is the time taken in seconds then: P = Δ E Δ t. There is also another unit of power which is still widely used: the horsepower.
Feb 20, 2022 · Power is the rate at which work is done, or in equation form, for the average power \ (P\) for work \ (W\) done over a time \ (t\), \ (P = W/t\). The SI unit for power is the watt (W), where \ (1 \space W ….
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.
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. units. watt is the unit of power. From the basic definition… any units of work (or energy) and time can be used to generate a unit of power.
Power can be expressed in units of watts (W). This unit can be used to measure power related to any form of energy or work. You have most likely heard the term used in relation to electrical devices, especially light bulbs. Multiplying power by time gives the amount of energy.
By applying the power formula, P = F v, the minimum power rating of the required motor is P = 6958 × 2 = 13,916 W. Also, 1 hp = 746 W, therefore required hp rating of motor is = 13916/746 or, 18.65 hp.
