( ( A force ) ( ( ( is nonconservative ) ( if ( ( ( the work ) ( ( done ( by ( that force ) ) ) ( in ( moving ( an object ) ) ) ) ) ( is path-dependent ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN force)) (VP (VBZ is) (ADJP (JJ nonconservative)) (SBAR (IN if) (S (NP (NP (DT the) (NN work)) (VP (VBN done) (PP (IN by) (NP (DT that) (NN force))) (PP (IN in) (S (VP (VBG moving) (NP (DT an) (NN object))))))) (VP (VBZ is) (ADJP (JJ path-dependent)))))) (. .)))
A force is nonconservative if the work done by that force in moving an object is path-dependent.
(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)))))) (. .)))