( Momentum ( ( is ( ( the mass ) ( of ( ( an object ) ( multiplied ( by ( its velocity ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Momentum)) (VP (VBZ is) (NP (NP (DT the) (NN mass)) (PP (IN of) (NP (NP (DT an) (NN object)) (VP (VBN multiplied) (PP (IN by) (NP (PRP$ its) (NN velocity)))))))) (. .)))
Momentum is the mass of an object multiplied by its 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-)))))))))))))) (. .)))