Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 11
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Consider the Equations P = Lim △ S → 0 F △ S and P1 - P2 = Pgz. in an Elevator Accelerating Upward - Physics


Consider the equations `P=lim_(triangles->0)"F"/(triangle"S")` and P1 - P2 = pgz. In an elevator accelerating upward


  • 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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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.

  Is there an error in this question or solution?
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HC Verma Class 11, 12 Concepts of Physics 1
Chapter 13 Fluid Mechanics
MCQ | Q 2 | Page 271
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