Question

define thrust and pressure give its s i unit

Answer 1

pressure is force per unit area S.I. unit is Pascal 'Pa'.
thrust is force exerted by an object perpendicular to the surface . S.I unit is Newton 'N'

i hope it helps................ 

Answer 2

pressure:-
force per unit area
SI UNIT:- pascal Pa
thrust:-
upward force exerted by an object
SI UNIT:-Newton