( ( ( The motion ) ( of ( a ( falling object ) ) ) ) ( can ( be ( described ( by ( ( ( Newton 's ) ( second law ) ) ( of ( ( ( motion -LRB- ) ( Force ( equals ( mass ( times acceleration ) ) ) ) ) -- ) ) ) ) ) ) ) )
(ROOT (S (NP (NP (DT The) (NN motion)) (PP (IN of) (NP (DT a) (VBG falling) (NN object)))) (VP (MD can) (VP (VB be) (VP (VBN described) (PP (IN by) (NP (NP (NP (NNP Newton) (POS 's)) (JJ second) (NN law)) (PP (IN of) (NP (NP (NN motion)) (-LRB- -LRB-) (NP (NNP Force) (NNP equals) (JJ mass) (NNS times) (NN acceleration)) (: --))))))))))
The motion of a falling object can be described by Newton's second law of motion (Force equals mass times acceleration --
(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.