A barometer kept in an elevator accelerating downwards with acceleration $\mathrm{a}$. The most likely pressure inside the elevator is ?
A barometer kept in an elevator accelerating downwards with acceleration $\mathrm{a}$. The most likely pressure inside the elevator is ?
The resultant acceleration of elevator in downwards direction $=g-a$ $\therefore$ The pressure in elevator $=h \rho(g-a)$
$=\frac{76 \times 13.6 \times(g-a)}{13.6 \times g} \mathrm{~cm}\; \mathrm{Hg}$
This pressure is greater than the atmospheric pressure $76 \mathrm{~cm} \;\mathrm{Hg}$.
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- [KVPY 2009]