Consider the equations P= undersetΔ S arrow 0L i m(F/Δ S) and P1-P2=ρ gz In an elevator accelerating upward,

Question

Consider the equations P= undersetΔ S arrow 0L i m(F/Δ S) and P1-P2=ρ gz In an elevator accelerating upward, (A) both the equations are valid (B) first is valid but not the second (C) second is valid but not the first (D) both are invalid

Tardigrade Admin · Accepted Answer

Equation 1 is universal equation of pressure but the second equation is valid only when it is in state of rest, while moving upward the pressure difference is Δ P=zρ (g + a)

Q. Consider the equations

$P = Δ S \to 0 L im \frac{F}{Δ S}$ and $P_{1} - P_{2} = ρ g z$

In an elevator accelerating upward,

both the equations are valid

first is valid but not the second

second is valid but not the first

both are invalid

Equation 1 is universal equation of pressure but the second equation is valid only when it is in state of rest, while moving upward the pressure difference is $Δ P = z ρ (g + a)$

Q. Consider the equations P=ΔS→0Lim​ΔSF​ and P1​−P2​=ρgz In an elevator accelerating upward,