( ( The impulse ) ( ( is ( equal ( to ( ( the amount ) ( of ( momentum change ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN impulse)) (VP (VBZ is) (ADJP (JJ equal) (PP (TO to) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN momentum) (NN change))))))) (. .)))
The impulse is equal to the amount of momentum change.
(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))))) (. .)))