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Define kinetic energy .Give its unit and dimensional formula and mention works by using it . |
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Answer» Solution :The energy of a bodyis the ability for capacity of the body to do work . Half of the product of the mass of a body and the square of its VELOITY is defined as kinetic energy (K) of the body . ` :. K =1/2 MV^(2)` where m = mass of body v = velocity or speed of the body . Unit of kinetic energyis same as the unit of work .So ,its SI unit is Joule (J) and CGS unit is erg . Dimensionalformula of kinetic energy is `[M^(1)L^(2)T^(-2)]` Hence ,a body of definite mass moving with more speed would have more kinetic energy compared to the kinetic energy of the same body moving with comparatively lesser speed . Kinetic energy is a SCALAR quantity . The kinetic energy of a body indicate the magnitude of work by the body during its motion . The kinetic energy of a fast flowing STREAM has been used during its motion . The kinetc energy of a fast flowing stream has been used to grind grains . Sailing SHIPS employ the kinetic energy of the wind mill . |
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