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Question
Consider the equations `P=lim_(triangles->0)"F"/(triangle"S")` and P1 - P2 = pgz. In an elevator accelerating upward
Options
both the equations are valid
the first is valid but not the second
the second is valid but not the first
both are invalid
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Solution
the first is valid but not the second
For a point inside the elevator, pressure can be defined as `P=lim_(triangles->0)"F"/(triangle"S")`. It is independent of the acceleration of the elevator.
The modified form of the second equation, which will be valid in the given case, is given by P1 - P2 = ρ(g+a0)z
Here, acceleration a0 (say) due to elevator accelerating upwards is also taken into account.
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