( ( ( ( ( ( An ( object 's ) ) momentum ) , ) ( for example ) ) , ) ( ( is ( ( its mass ) ( multiplied ( by ( its velocity ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT An) (NN object) (POS 's)) (NN momentum)) (, ,) (PP (IN for) (NP (NN example))) (, ,)) (VP (VBZ is) (NP (NP (PRP$ its) (NN mass)) (VP (VBN multiplied) (PP (IN by) (NP (PRP$ its) (NN velocity)))))) (. .)))
An object's momentum, for example, is its 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-)))))))))))))) (. .)))