( Momentum ( ( is ( ( ( the ( object 's ) ) mass ) ( times ( the velocity ) ) ) ) . ) )
(ROOT (S (NP (NNP Momentum)) (VP (VBZ is) (NP (NP (NP (DT the) (NN object) (POS 's)) (NN mass)) (PP (CC times) (NP (DT the) (NN velocity))))) (. .)))
Momentum is the object's mass times the velocity.
(ROOT (S (NP (NNP Momentum)) (VP (MD can) (VP (VB be) (VP (VBN calculated) (PP (IN by) (S (VP (VBG multiplying) (NP (NP (NP (DT an) (NN object) (POS 's)) (NN mass)) (PP (IN in) (NP (NP (NNS kilograms)) (PRN (-LRB- -LRB-) (NP (NN kg)) (-RRB- -RRB-))))) (PP (IN by) (NP (NP (PRP$ its) (NN velocity)) (PP (IN in) (NP (NP (NNS meters)) (PP (IN per) (NP (NP (JJ second)) (PRN (-LRB- -LRB-) (NP (NN m/s)) (-RRB- -RRB-)))))))))))))) (. .)))