( Compare ( ( ( ( ( ( ( the ( ( directions and ) magnitudes ) ) ( of ( ( his ( instantaneous velocity ) ) ( at A ) ) ) ) , ) ( ( his ( instantaneous velocity ) ) ( at C ) ) ) , ) and ) ( ( his ( average velocity ) ) ( ( going ( from A ) ) ( to C. ) ) ) ) )
(ROOT (S (VP (VB Compare) (NP (NP (NP (DT the) (NNS directions) (CC and) (NNS magnitudes)) (PP (IN of) (NP (NP (PRP$ his) (JJ instantaneous) (NN velocity)) (PP (IN at) (NP (NNP A)))))) (, ,) (NP (NP (PRP$ his) (JJ instantaneous) (NN velocity)) (PP (IN at) (NP (NNP C)))) (, ,) (CC and) (NP (NP (PRP$ his) (JJ average) (NN velocity)) (VP (VBG going) (PP (IN from) (NP (NNP A))) (PP (TO to) (NP (NNP C.)))))))))
Compare the directions and magnitudes of his instantaneous velocity at A, his instantaneous velocity at C, and his average velocity going from A to C.
(ROOT (S (NP (JJ Instantaneous) (NN velocity)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN velocity)) (PP (IN of) (NP (DT the) (NN object))))) (PP (IN at) (NP (DT a) (VBN given) (NN moment))))) (. .)))