( Impulse ( ( is ( force ( multiplied ( by time ) ) ) ) . ) )
(ROOT (S (NP (NNP Impulse)) (VP (VBZ is) (NP (NP (NN force)) (VP (VBN multiplied) (PP (IN by) (NP (NN time)))))) (. .)))
Impulse is force multiplied by time.
(ROOT (S (NP (NNP Impulse)) (VP (VBZ is) (NP (NP (DT the) (NN quantity)) (PP (IN of) (NP (NP (NN force)) (VP (VBN multiplied) (PP (IN by) (NP (NP (DT the) (NN time)) (SBAR (S (NP (PRP it)) (VP (VBZ is) (VP (VBN applied)))))))))))) (. .)))