In [[physics]], work refers to the product of [[force]] and [[distance]] vectors<ref>Serway and Beichner, ''Physics for Scientists and Engineers'', Fifth Edition</ref>. ''W'' = F · d Or: ''W'' = F d cos θ Where θ is the angle that separates the vectors. The second form of the equation is the expanded form of the "dot product" in the first equation. In physics, the dot product "a · b" (read "a dot b") can be rewritten as "a b cos θ". Work is a transfer of [[energy]]; if ''W'' is positive, there is a transfer of energy ''to'' the system, and if ''W'' is negative there is a transfer of energy ''from'' the system. Its units are that of force multiplied by distance, in SI this is [[newton (unit)|Newton]] · [[Meter]], or [[Joule]] ==References==<references/>[[category:physics]][[Category:Mechanics]]Server Error 404- Page Not Found
