( ( ( ( ( ( ( Mass and ) velocity ) ( are ( ( the ( most ( direct measures ) ) ) ( of momentum ) ) ) ) , ) but ) ( ( kinetic energy ) ( ( can also ) ( be ( ( a ( useful variable ) ) ( in ( finding momentum ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Mass) (CC and) (NNP velocity)) (VP (VBP are) (NP (NP (DT the) (RBS most) (JJ direct) (NNS measures)) (PP (IN of) (NP (NN momentum)))))) (, ,) (CC but) (S (NP (JJ kinetic) (NN energy)) (VP (MD can) (ADVP (RB also)) (VP (VB be) (NP (NP (DT a) (JJ useful) (NN variable)) (PP (IN in) (S (VP (VBG finding) (NP (NN momentum))))))))) (. .)))
Mass and velocity are the most direct measures of momentum, but kinetic energy can also be a useful variable in finding momentum.
(ROOT (S (NP (NNP Momentum)) (VP (VBZ is) (ADJP (RB directly) (VBN related) (PP (TO to) (NP (NP (DT both) (NN mass)) (CC and) (NP (NN velocity)))))) (. .)))