A barometer kept in an elevator reads 76 cm when the elevator is accelerating upwards. The most likely pressure inside the elevator (in cm of Hg) is

When the elevator is going upwards with acceleration a then net acceleration will be the sum of a and g(acceleration due to gravity).


Pressure = hρ ( g + a) dyne/cm2

76 × 13.6 × (g+a)/76 × 13.6 × g cm of Hg. 1 + a/g >1cm of Hg.

The final pressure should be more than 76cm of hg

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