An unconscious person is flaccid and awkward to lift because his body adjusts and absorbs our attempts to lift it as a unit. A conscious person’s body offers far greater muscular tone and thus allows itself to be lifted more as a rigid unit. In other words, it doesn’t ooze, stretch, resist, or absorb our efforts to lift it. A fluid body absorbs the work done on specific points of itself. But if you place each item (steel box and sack of potatoes) on a palette and lifted them both with forklifts then they would be equally easy to lift.
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