( ( From ( ( ( Newton 's ) ( second law ) ) ( of motion ) ) ) ( , ( ( ( the acceleration ) ( times ( the mass ) ) ) ( ( equals ( the ( external force ) ) ) . ) ) ) )
(ROOT (S (PP (IN From) (NP (NP (NP (NNP Newton) (POS 's)) (JJ second) (NN law)) (PP (IN of) (NP (NN motion))))) (, ,) (NP (NP (DT the) (NN acceleration)) (PP (CC times) (NP (DT the) (NN mass)))) (VP (VBZ equals) (NP (DT the) (JJ external) (NN force))) (. .)))
From Newton's second law of motion , the acceleration times the mass equals the external force.
(ROOT (S (S (NP (NP (NP (NNP Newton) (POS 's)) (JJ second) (NN law)) (PP (IN of) (NP (NN motion)))) (VP (VBZ is) (NP (QP (JJR more) (IN than) (DT a)) (NN definition)))) (: ;) (S (NP (PRP it)) (VP (VBZ is) (NP (NP (DT a) (NN relationship)) (PP (IN among) (NP (NP (NN acceleration)) (, ,) (NP (NN force)) (, ,) (CC and) (NP (NN mass))))))) (. .)))
Newton’s second law of motion is more than a definition; it is a relationship among acceleration, force, and mass.