( ( ( The ( left side ) ) ( of ( this equation ) ) ) ( ( ( is ( ( the work ) ( of ( the ( applied force ) ) ) ) ) ( as ( it ( ( acts ( on ( ( the particle ) ( along ( ( the trajectory ) ( from ( time t1 ) ) ) ) ) ) ) ( to ( time t2 ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ left) (NN side)) (PP (IN of) (NP (DT this) (NN equation)))) (VP (VBZ is) (NP (NP (DT the) (NN work)) (PP (IN of) (NP (DT the) (JJ applied) (NN force)))) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ acts) (PP (IN on) (NP (NP (DT the) (NN particle)) (PP (IN along) (NP (NP (DT the) (NN trajectory)) (PP (IN from) (NP (NN time) (NNS t1))))))) (PP (TO to) (NP (NN time) (NNS t2))))))) (. .)))
The left side of this equation is the work of the applied force as it acts on the particle along the trajectory from time t1 to time t2.
(ROOT (S (NP (NNP Force) (NNS times) (NN distance)) (VP (VBZ is) (NP (NP (DT the) (NN equation)) (PP (IN for) (NP (NN work))))) (. .)))