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(C) The effective acceleration due to gravity inside an elevator accelerating upwards with acceleration $a$ is given by $g_{eff} = g + a$.The pressure

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Pressure $= h \rho (g + a)$

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(C) The effective acceleration due to gravity inside an elevator accelerating upwards with acceleration $a$ is given by $g_{eff} = g + a$.The pressure exerted by a liquid column of height $h$ and density $\rho$ is given by the formula $P = h \rho g_{eff}$.Substituting the value of $g_{eff}$,we get the pressure inside the elevator as $P = h \rho (g + a)$.Since $a > 0$,the pressure measured by the barometer will be greater than the standard atmospheric pressure $h \rho g$.

$A$ barometer is kept in an elevator accelerating upwards with an acceleration $a$. Find the most likely pressure inside the elevator.

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