Define thrust and pressure and give their unit and dimensional formula

1.	Define thrust and pressure and give their unit and dimensional formula.
Answer» Solution :(i) The force applied on a SURFACE in a direction perpendicular to the surface is called thrust. Due to thrust LIQUID flow out from the hole of container . Thrustis a force . ItsSI unit is Newton (N).Its dimensional formula is `[M^(1)L^(1)T^(-2)]`. (ii)Pressure : Force ACTING on a surface per unit area , in a direction perpendicular to it is called pressure on the surface. If F acting perpendicular to the surface of area A then pressure `P=(F)/(A)` SI unit of pressure `(N)/(m^(2))`Pascal (Pa) CGS unit of pressure is `("dyne")/(cm^(2))`. Dimensional formula of pressure is `[M^(1)L^(-1)T^(-2)]`.

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