( Dynamics ( ( is ( ( the study ) ( of ( motions ( that ( results ( from forces ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Dynamics)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NP (NNS motions)) (SBAR (WHNP (WDT that)) (S (VP (VBZ results) (PP (IN from) (NP (NNS forces)))))))))) (. .)))
Dynamics is the study of motions that results from forces.
(ROOT (S (NP (NNP Dynamics)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (IN of) (SBAR (WHADVP (WRB how)) (S (NP (NNS forces)) (VP (VBP affect) (NP (NP (DT the) (NN motion)) (PP (IN of) (NP (NNS objects)))))))))) (. .)))
Dynamics is the study of how forces affect the motion of objects.