( ( In physics ) ( , ( work ( ( is ( defined ( as ( ( a force ) ( ( acting ( upon ( an object ) ) ) ( to ( cause ( a displacement ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN physics))) (, ,) (NP (NN work)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT a) (NN force)) (VP (VBG acting) (PP (IN upon) (NP (DT an) (NN object))) (S (VP (TO to) (VP (VB cause) (NP (DT a) (NN displacement)))))))))) (. .)))
In physics, work is defined as a force acting upon an object to cause a displacement .
(ROOT (S (PP (IN In) (NP (NN physics))) (, ,) (NP (NN work)) (VP (VBZ means) (S (NP (NP (DT the) (NN use)) (PP (IN of) (NP (NN force)))) (VP (TO to) (VP (VB move) (NP (DT an) (NN object)))))) (. .)))