( ( This equation ) ( ( says ( that ( ( ( ( ( the work ) ( -LRB- ( ( or W ) -RRB- ) ) ) ( -LRB- ( ( in joules ) -RRB- ) ) ) ( ( done ( by ( a force ) ) ) ( -LRB- ( ( or F ) -RRB- ) ) ) ) ( is ( equal ( to ( ( ( ( the product ) ( of ( that force ) ) ) and ) ( ( ( the distance ) ( -LRB- ( d -RRB- ) ) ) ( ( over which ) ( it acts ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN equation)) (VP (VBZ says) (SBAR (IN that) (S (NP (NP (NP (NP (DT the) (NN work)) (PRN (-LRB- -LRB-) (NP (QP (CC or) (CD W))) (-RRB- -RRB-))) (PRN (-LRB- -LRB-) (PP (IN in) (NP (NNS joules))) (-RRB- -RRB-))) (VP (VBN done) (PP (IN by) (NP (DT a) (NN force))) (PRN (-LRB- -LRB-) (CC or) (VB F) (-RRB- -RRB-)))) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (NP (DT the) (NN product)) (PP (IN of) (NP (DT that) (NN force)))) (CC and) (NP (NP (DT the) (NN distance)) (PRN (-LRB- -LRB-) (NP (NNP d)) (-RRB- -RRB-)) (SBAR (WHPP (IN over) (WHNP (WDT which))) (S (NP (PRP it)) (VP (VBZ acts)))))))))))) (. .)))
This equation says that the work (or W) (in joules) done by a force (or F) is equal to the product of that force and the distance (d) over which it acts.
(ROOT (S (NP (NNP Force) (NNS times) (NN distance)) (VP (VBZ is) (NP (NP (DT the) (NN equation)) (PP (IN for) (NP (NN work))))) (. .)))