( History ( of ( centrifugal ( and ( centripetal forces ) ) ) ) )
(ROOT (NP (NP (NN History)) (PP (IN of) (NP (JJ centrifugal) (CC and) (JJ centripetal) (NNS forces)))))
History of centrifugal and centripetal forces
(ROOT (S (NP (JJ Centripetal) (NN force)) (VP (VBZ is) (NP (NP (DT the) (NN force)) (SBAR (WHNP (WDT that)) (S (VP (VBZ causes) (NP (JJ centripetal) (NN acceleration))))))) (. .)))