( ( Thrust Thrust ) ( ( is ( ( the force ) ( that ( ( ( propels ( a ( ( rocket or ) spacecraft ) ) ) and ) ( is ( measured ( in ( pounds ( , ( ( kilograms or ) Newtons ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Thrust) (NNP Thrust)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBZ propels) (NP (DT a) (NN rocket) (CC or) (NN spacecraft))) (CC and) (VP (VBZ is) (VP (VBN measured) (PP (IN in) (NP (NNS pounds) (, ,) (NNS kilograms) (CC or) (NNS Newtons)))))))))) (. .)))
Thrust Thrust is the force that propels a rocket or spacecraft and is measured in pounds, kilograms or Newtons.
(ROOT (S (NP (NNP Thrust)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (VP (VBG pushing) (NP (DT a) (NN rocket))))) (. .)))