JEE Main 2014PhysicsMechanical Properties of SolidsEasyMCQ

JEE Main 2014 — Mechanical Properties of Solids Question with Solution

JEE Main 2014 (19 Apr Online)

Question

The velocity of water in a river is 18 km h-1 near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The coefficient of viscosity of water=10-2 poise.

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Show full solutionCorrect option: B
Correct answer
B10-3 N m-2

Step-by-step explanation

Viscous force =Fv=-ηA·dvdh

=10-3×A×18×10003600×5 ,   η=10-2 poiseη=10-3 decapoise mks

∴ FvA=185×3600=1200×5

⇒FvA=10-3 N m-2

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About this question

This is a previous-year question from JEE Main 2014, covering the Mechanical Properties of Solids chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.