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Some Mechanical Properties of Matter — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSome Mechanical Properties of Matter1 Mark
MCQ
The viscous force acting between two layers of a liquid is given by $\frac{\text{F}}{\text{A}}=-\eta\frac{\text{dv}}{\text{dz}}$ This $\frac{\text{F}}{\text{A}}$ may be called:
  • A
    Pressure.
  • B
    Longitudinal stress.
  • ✓
    Tangential stress.
  • D
    Volume stress.
✓

Answer

Correct option: C.
Tangential stress.
Explanation:
The viscous force acts tangentially between two parallel layers of a liquid. In terms of force on a material, it is analogous to a shearing force.

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