( ( In Collisions ) ( , ( ( Conservation of ) ( ( Momentum ( And ( of Energy ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NNP Collisions))) (, ,) (NP (NP (NNP Conservation)) (PP (IN of))) (VP (VBD Momentum) (SBAR (FRAG (CC And) (PP (IN of) (NP (NNP Energy)))))) (. .)))
In Collisions, Conservation of Momentum And of Energy.
(ROOT (S (NP (DT A) (ADJP (RB perfectly) (JJ inelastic)) (NN collision)) (VP (VBZ reduces) (NP (JJ internal) (JJ kinetic) (NN energy)) (PP (TO to) (NP (NP (DT the) (NN minimum)) (SBAR (S (NP (PRP it)) (VP (MD can) (VP (VB have) (NP (NN while)) (ADVP (RB still)) (S (VP (VBG conserving) (NP (NN momentum))))))))))) (. .)))