( ( the impulse ) ( ( ( ( causes ( -LRB- ( and ( ( is ( equal to ) ) -RRB- ) ) ) ) ( the change ) ) ( in momentum ) ) . ) )
(ROOT (S (NP (DT the) (NN impulse)) (VP (VBZ causes) (PRN (-LRB- -LRB-) (CC and) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to)))) (-RRB- -RRB-)) (NP (DT the) (NN change))) (PP (IN in) (NP (NN momentum))) (. .)))
the impulse causes (and is equal to) the change in momentum.
(ROOT (S (NP (NP (NNP Change)) (PP (IN in) (NP (NP (NN momentum)) (PP (IN in) (NP (DT an) (NN object)))))) (VP (VBZ is) (ADJP (JJ equivalent) (PP (TO to) (NP (NN impulse))))) (. .)))