( ( determine ( ( kinetic ( and ( potential energy ) ) ) ( of ( a system ) ) ) ) ; )
(ROOT (S (VP (VB determine) (NP (NP (JJ kinetic) (CC and) (JJ potential) (NN energy)) (PP (IN of) (NP (DT a) (NN system))))) (: ;)))
determine kinetic and potential energy of a system;
(ROOT (S (NP (NP (DT The) (NN sum)) (PP (IN of) (NP (NP (DT the) (JJ kinetic) (CC and) (JJ potential) (NNS energies)) (PP (IN of) (NP (NP (DT a) (NN system) (POS 's)) (NNS atoms) (CC and) (NNS molecules)))))) (VP (VBZ is) (VP (VBN called) (NP (JJ internal) (NN energy)))) (. .)))