Ministry of Defence Main Building (United Kingdom) each and cost £12,600. Similar figures representing "air" and "fire" were intended to be installed at the south end of the building, however these were never constructed. During the 1950s, building staff nicknamed the statues "Mr and Mrs Parkinson", after Cyril Northcote Parkinson, the Board of Trade civil servant who devised Parkinson's Law which states "work expands so as to fill the time available for its completion". More recently MOD staff refer to the statues as the "two fat ladies". The badge of the RAF is carved into stone columns either side of the southern entrance to the building, reflecting
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