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Concepts Of Physics MCQ Edition [Volume 1]

Exam: Concepts Of Physics MCQ Edition [Volume 1]
Subject: Physics
Chapter: Some Mechanical Properties of Matter

Concepts Of Physics MCQ Edition [Volume 1] · Physics · Some Mechanical Properties of Matter

The viscous force present between two layers of a liquid is...

The viscous force present between two layers of a liquid is expressed as

\dfrac{F}{A} = -\eta \dfrac{dv}{dz}

. The quantity

F/A

can be referred to as

Options

Avolume stress
Blongitudinal stress
Cpressure
Dtangential stress

Correct answer

D. tangential stress

Step-by-step solution

The viscous force

F

acts parallel to the layers of the liquid to oppose their relative motion.

Since the force is applied tangentially to the surface area

A

of the layers, the quantity

F/A

represents the tangential force per unit area.

The tangential force per unit area is defined as tangential stress or shear stress.

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