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According to the scientific definition, which is not an example of work?
A.
pushing a tack into a block of cork
B.
pulling a nail out of a piece of wood
C.
brushing teeth
D.
leaning against a large cargo crate
The answer should be D, because there is no motion involved. Unless, of course, you are heavier than a large cargo crate.
Work is expressed in Joules, which are Newtons times meters. Meters are a unit of distance, so if the force (in Newtons) is not producing any distance, there is no work.
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