How do you derive the unit of power?
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How do you derive the unit of power?
The dimension of power is energy divided by time. 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.
Is kgm 2 S 3 a unit of power?
James Watt measured the power that can be exerted by a standard horse, the horsepower. His contributions to science and technology are recognized in the unit of power (the watt) in SI, the International System of Units. 1 watt = 1 joule per second = 1 newton meter per second = 1 kg m2 s-3.
What unit is kg/m s3?
kilogram per cubic metre
The SI has special names for 22 of these derived units (for example, hertz, the SI unit of measurement of frequency), but the rest merely reflect their derivation: for example, the square metre (m2), the SI derived unit of area; and the kilogram per cubic metre (kg/m3 or kg⋅m−3), the SI derived unit of density.
What is power and its derivation?
Power (P) = Work × time-1. Or, P = [M1 L2 T-2] × [T-1] = M1 L2 T-3. Therefore, power is dimensionally represented as M1 L2 T-3.
What unit is kgm 2 s 2?
Potential energy is energy stored in matter. The joule (J) is the SI unit of energy and equals (kg×m2s2) ( kg × m 2 s 2 ) .
What is a kgm 2 s 2?
The amount of work is 1 kg*m^2/s^2 means that it is equivalent to 1 * N * m or 1 newton * meter. 1 newton is equivalent to the product of 1 kg and 1 m/s^2. Multiplying 1 N by 1 m gives 1 Nm of work or 1 joule of energy.
Is m SA derived unit?
m/s is an obvious one. The Newton is equivalent to kg m / s^2. These are called derived units because they are derived from combinations of the base 7. Because the quantity is not a unit; it is made up (derived) from two basic units, a length and time, by calculating m/s, which is a speed.
What is derive unit?
derived unit. noun. a unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.