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Assertion: The acceleration of a body down a rough inclined plane is greater than the acceleration due to gravity.

Reason: The body is able to slide on an inclined plane only when its acceleration is greater than the acceleration due to gravity.

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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 1
Which one of the following is not used to reduce friction?
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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 2

Assertion: It is easier to pull a heavy object than to push it on a level ground.

Reason: The magnitude of frictional force depends on the nature of the two surfaces in contact.

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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 3
If a ladder weighing 250 N is placed against a smooth vertical wall having coefficient of friction between it and floor 0.3 then what is the maximum force of friction available at the point of contact between the ladder and the floor?
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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 4

The coefficient of static friction, μS , between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless.g=10m 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 5
A lift is moving downwards with an acceleration equal to the acceleration due to gravity. A body of mass m kept on the floor of the lift is pulled horizontally. If the coefficient of friction is μ, then the frictional resistance offered by the body 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 6
Maximum acceleration of the train in which a 50 kg box lying on its floor will remain stationary is (Given: Coefficient of static friction between the box and the train's floor is 0.3 and 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 7
horizontal surface with initial velocity  v. If μ is the coefficient of sliding friction between the block and surface, the block will come to rest after time (g is acceleration due to gravity)
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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 8
A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and the plane is 0.8 If the frictional force on the block is 10 N, the mass of the block is g=10 ms-2