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Spherical balls of radius r are falling in a viscous fluid of viscosity η with velocity v. The retarding viscous force acting on the spherical ball is 

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Important Questions on Friction in Solids and Liquids

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 53
A gas bubble of 2 cm diameter rises through a liquid of density 1.75 g cm-3 with a fixed speed of 0.35 cm s-1. Neglect the density of the gas. The coefficient of viscosity of the liquid is...Take g=981 cm s-2
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 54
What will be the approximate terminal velocity of a raindrop of diameter 1.8×10-3 m, when the density of rainwater≈103 kg m-3, and the coefficient of the viscosity of air ≈1.8×10-5 N s m-2? (Neglect buoyancy of air.)
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 55
When a solid ball of the volume V is released in a viscous liquid it experiences a viscous force F at a certain velocity. If the solid ball of the same material of volume 2V is released in the same liquid then the viscous force experienced by it at the same velocity will be
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 56

A small spherical solid ball is dropped from a great height in a viscous liquid. Its journey in the liquid is best described in the diagram given below by the

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 57
A small metal ball of mass m is dropped in a liquid contained in a vessel, attains a terminal velocity v. If a metal ball of the same material but of mass 8 m is dropped in the same liquid then the terminal velocity will be
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 58
A small sphere of mass m is dropped from a great height. After it has fallen 100 m it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first 100 m of fall is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 59
If the terminal speed of gold of density 19.5 kg m-3 is 0.2 m s-1 in a viscous liquid of density 1.5 kg m-3, find the terminal speed of a sphere of silver of density 10.5 kg m-3 of the same size in the same liquid
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 4 - Friction in Solids and Liquids>Competitive Thinking>Q 60
Two solid spheres of same metal but of mass M and 8 M fall simultaneously on a viscous liquid and their terminal velocities are v and nv, then value of n is