( ( No shearing ) ( ( stresses ( can ( ( exist ( at ( ( ( the surfaces ) or ) A ) ) ) ( if ( ( the fluid ) ( is ( in ( ( a state ) ( of ( hydrostatic equilibrium ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT No) (NN shearing)) (VP (VBZ stresses) (SBAR (S (VP (MD can) (VP (VB exist) (PP (IN at) (NP (NP (DT the) (NNS surfaces)) (CC or) (NP (NNP A)))) (SBAR (IN if) (S (NP (DT the) (NN fluid)) (VP (VBZ is) (PP (IN in) (NP (NP (DT a) (NN state)) (PP (IN of) (NP (JJ hydrostatic) (NN equilibrium))))))))))))) (. .)))
No shearing stresses can exist at the surfaces or A if the fluid is in a state of hydrostatic equilibrium.
(ROOT (S (NP (NNP Fluid)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT a) (NN state)) (PP (IN of) (NP (NN matter))))) (SBAR (WHNP (WDT that)) (S (VP (VBZ yields) (PP (TO to) (NP (JJ sideways) (CC or) (JJ shearing) (NNS forces)))))))) (. .)))