( ( Mechanical work ) ( ( is ( defined ( as ( ( ( force ( times distance ) ) , ) ( when ( ( the two ) ( are ( in ( the ( same direction ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Mechanical) (NN work)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (NN force) (NNS times) (NN distance)) (, ,) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (CD two)) (VP (VBP are) (PP (IN in) (NP (DT the) (JJ same) (NN direction)))))))))) (. .)))
Mechanical work is defined as force times distance, when the two are in the same direction.
(ROOT (S (NP (NNP Force) (NNS times) (NN distance)) (VP (VBZ is) (NP (NP (DT the) (NN equation)) (PP (IN for) (NP (NN work))))) (. .)))