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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 82
The dimension of critical velocity vc of a liquid flowing through a tube are expressed as ηxρyrz, where η,ρ and r are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then, the values of x,y and z are given by
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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 83
The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and the lower half of the plane is given by
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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 84
A bullet of mass 50 g moving horizontally with a velocity of 210 m s-1 gets embedded in a block of mass 1 kg kept on a rough horizontal surface. If the coefficient of kinetic friction between the block and surface is 0.5. The block-bullet system will move a distance of _____________before coming to rest. (Acceleration due to gravity =10 m 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 85
A body of weight 64 N is pushed with just enough force to make it move across a horizontal floor and the same force continues to act afterwards. If the coefficient of static and dynamic friction are 0.6 and 0.4  respectively, the acceleration of the body will be (acceleration due to gravity=g)
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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 86
The three vessels shown in figure have same base area. Equal volumes of a liquid are poured in the three vessels. The force on the base by the liquid 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 87
A fireman of mass 60 kg slides down a pole, as shown in the figure. He is pressing the pole with a force of 600 N. The coefficient of friction between the hands and the pole is 0.5. With what acceleration will the fireman slide down? g=10 m 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 88
A tank is filled with water up to a height H. Water is allowed to come out of a hole P in one of the walls at a depth D below the surface of water. The horizontal distance x in terms of H and D 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 89

A point particle of mass m, moves along the uniformly rough track PQR as shown in the figure. The coefficient of friction, between the particle and the rough track equals μ. The particle is released, from rest from the point P and it comes to rest at a point R. The energies, lost by the ball, over the parts, PQ and QR, of the track are equal to each other, and no energy is lost when particle changes direction from PQ to QR. The values of the coefficient of friction μ and the distance x=QR, are respectively close to  

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