Work 4 : Is done by a force when it produces motion in a body against a resistance. It is measured by the product of force and distance and the unit of work is the joule. (1 foot lb = 1. 356 J)
H. J. Porter (Chairman - Technical Committee), Dictionary of Fire Technology, The Institution of Fire Engineers, The Victory Press (Leicester) Ltd. 1979 UK. (Fr Tech - Brit) {81}