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In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a horse; one mechanical horsepower equals about 745.7 watts.
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 ...
We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s). Sometimes the power of motor vehicles and other machines is given in terms of Horsepower (hp), which is approximately equal to 745.7 watts.
What is the SI Unit of Power in Physics? To define units of power let us look into how the SI system works. The SI or metric system has only 7 base units, and all the other units are derived from these base units.
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 1W = 1J / s. The power of many devices such as electric motors is also often expressed in horsepower (hp), where 1 hp = 746W.
The SI (International System of Units) unit of power is the watt (W). Defined as one joule per second, the watt measures the rate at which energy is used or produced.
The standard unit used to measure power is the watt which has the symbol W . The unit is named after the Scottish inventor and industrialist James Watt. You have probably come across the watt often in everyday life. The power output of electrical equipment such as light bulbs or stereos is typically advertised in watts.
What is the unit of power? Watt is the unit of power. The International System unit of power is the joule per second, which is given the special name watt (lowercase) with the symbol being W (uppercase, not italics).
A concept closely related to energy is power: the time rate of energy change or energy transfer. The SI unit of power is a joule per second, J/s and is given the name watt, W. Table 1.4.1: Some common energy units and conversions to SI: 1 kWh = 3.6 MJ. 1 erg = 10 − 7 10 − 7.
The unit of power is the joule per second (J/s), known as the watt. The rate at which the body uses food energy to sustain life and to do different activities is called the metabolic rate, and the corresponding rate when at rest is called the basal metabolic rate (BMR).