( ( The ( centripetal acceleration ) ) ( ( is ( caused ( by ( ( a ( centripetal force ) ) ( that ( directs ( to ( ( the center ) ( of ( the object ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ centripetal) (NN acceleration)) (VP (VBZ is) (VP (VBN caused) (PP (IN by) (NP (NP (DT a) (JJ centripetal) (NN force)) (SBAR (WHNP (WDT that)) (S (VP (VBZ directs) (PP (TO to) (NP (NP (DT the) (NN center)) (PP (IN of) (NP (DT the) (NN object)))))))))))) (. .)))
The centripetal acceleration is caused by a centripetal force that directs to the center of the object.
(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))))))) (. .)))