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Mechanical energy E of particle, system or object is explained as the sum of kinetic energy K and potential energy U, i.e. E = K + U. It is a scalar quantity having dimensions [ML2T-2] and SI unit joule.
(i) It relays on frame of reference.
(ii) A body may have mechanical energy without having either kinetic energy or potential energy. Though, if both potential and kinetic energies are zero, mechanical energy will be zero. The result may or may not be true, i.e., if E = 0 either both KE and PE are zero or PE negative and KE positive such that KE + PE = 0
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what is the displacement of the body when potential and kinetic energies are eqal?
An egg beater Study an egg beater, hand drill or some other device in which an enhance of speed is obtained by means of gears.
the magnitude and direction of acceleration of body both are constant will the body moves in straight line
brewesters law
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