Parkinson's law Parkinson's law Parkinson's law is the adage that "work expands so as to fill the time available for its completion". It is sometimes applied to the growth of bureaucracy in an organization. This law is likely derived from ideal gas law, whereby a gas expands to fit the volume allotted. Articulated by Cyril Northcote Parkinson as part of the first sentence of an essay published in "The Economist" in 1955 and since republished online, it was reprinted with other essays in the book "Parkinson's Law: The Pursuit of Progress" (London, John Murray, 1958). He derived the dictum from his extensive
Work (physics) the kinetic energy of the particle by a simple derivation analogous to the equation above. Some authors call this result "work–energy principle", but it is more widely known as the work–energy theorem: The identity formula_54 requires some algebra. From the identity formula_55 and definition formula_56 it follows The remaining part of the above derivation is just simple calculus, same as in the preceding rectilinear case. In particle dynamics, a formula equating work applied to a system to its change in kinetic energy is obtained as a first integral of Newton's second law of motion. It is useful to notice that