( Momentum ( ( is ( ( ( a ( moving ( object 's ) ) ) mass ) ( multiplied ( by ( its velocity ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Momentum)) (VP (VBZ is) (NP (NP (NP (DT a) (VBG moving) (NN object) (POS 's)) (NN mass)) (VP (VBN multiplied) (PP (IN by) (NP (PRP$ its) (NN velocity)))))) (. .)))
Momentum is a moving object's mass 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-)))))))))))))) (. .)))