( ( ( ( ( ( Weight force ) , ) ( normal ( force Forces ) ) ) ( of ( gravity 7 ) ) ) -RRB- ) ( ( Draw ( free ( body diagrams ) ) ) . ) )
(ROOT (S (NP (NP (NNP Weight) (NN force)) (, ,) (NP (JJ normal) (NN force) (NNS Forces)) (PP (IN of) (NP (NN gravity) (CD 7))) (-RRB- -RRB-)) (VP (VBZ Draw) (NP (JJ free) (NN body) (NNS diagrams))) (. .)))
Weight force, normal force Forces of gravity 7) Draw free body diagrams.
(ROOT (S (NP (NNP Weight)) (VP (VBZ is) (NP (NP (DT the) (NN result)) (PP (IN of) (NP (NP (DT the) (NN force)) (PP (IN of) (NP (NP (NN gravity)) (VP (VBG being) (VP (VBN opposed) (PP (IN by) (NP (DT the) (JJ normal) (NN force))))))))))) (. .)))