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Fluid Mechanics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsFluid Mechanics1 Mark
MCQ
Consider the situation of the previous problem. Let the water push the left wall by a force $F_1$ and the right wall by a force $F_2,$
  • A
    $\mathrm{F}_1=\mathrm{F}_2$
  • ✓
    $\mathrm{~F}_1>\mathrm{F}_2$
  • C
    $\mathrm{~F}_1<\mathrm{F}_2$
  • D
    The information is insufficient to know the relation between $F_1$ and $F_2$
✓

Answer

Correct option: B.
$\mathrm{~F}_1>\mathrm{F}_2$
When the box is accelerated towards right, the water in the box experiences a pseudo force $(ma)$ towards left, where m is the mass of water.
So, the force $F_1$ exerted by the water on the the left wall of the box is greater.

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