In MKS measurement system, kilograms are used to measure mass
The correct unit for speed in MKS system is 'm'.
The MKS (meter-kilogram-second) system is a variant of the metric system that uses the meter for length, kilogram for mass, and second for time. The SI (International System of Units) system builds on the MKS system but includes additional base units, such as the kelvin for temperature and the candela for luminous intensity. As a result, the SI system is more comprehensive and widely used in scientific and engineering fields.
when the unit of any physical quantity is measured in terms of meter or kilogram or second or in combination of these then it is said that unit is in MKS system.
In the MKS (meter-kilogram-second) system, the unit of mass is the kilogram (kg).
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SI system is a rationalised MKS system.The earlier MKS system provided different units for different physical quantities, which was not at all convinient to use. But, the MKS system provides single unit for different physical quantities,which makes it convinient. The CGS system could not find solutions to physical quantities not involving LENGTH,TIME and MASS. Hence, it could not be used. The FPS system or BUS system was not a metric system and hence was not useful.
There are several MKS systems (metric systems based on meter, kilogram, second); the one most used is called SI. In this case, the unit of temperature is the Kelvin.
Any energy - electrical or otherwise - is measured in Joule.
CGS is NOT common nowadays. MKS is common because the SI, the international system of units, is based on it.
The centimetre-gram-second system (CGS) is a system of physical units. It is always the same for mechanical units, but there are several variants of electric additions. It was replaced by the MKS, or metre-kilogram-second system, which in turn was replaced by the International System of Units (SI), which has the three base units of MKS plus the ampere, mole, candela and kelvin. from Arun
meter/second2.