( Impulse ( ( is ( ( ( the product ) ( of ( ( ( the ( applied force ) ) and ) ( the time ) ) ) ) ( ( over which ) ( ( that force ) ( is applied ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Impulse)) (VP (VBZ is) (NP (NP (DT the) (NN product)) (PP (IN of) (NP (NP (DT the) (JJ applied) (NN force)) (CC and) (NP (DT the) (NN time)))) (SBAR (WHPP (IN over) (WHNP (WDT which))) (S (NP (DT that) (NN force)) (VP (VBZ is) (VP (VBN applied))))))) (. .)))
Impulse is the product of the applied force and the time over which that force is applied.
(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)))))))))))) (. .)))